As evdns_server_new_with_base.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which even_base it uses. The recommended function is
  evdns_add_server_port_with_base().
Remove all configured nameservers, and suspend all pending resolves. Resolves
  will not necessarily be re-attempted until evdns_resume() is called.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_clear_nameservers_and_suspend().
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_resume()
Get the number of configured nameservers. This returns the number of configured
  nameservers (not necessarily the number of running nameservers). This is
  useful for double-checking whether our calls to the various nameserver
  configuration functions have been successful.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_count_nameservers().
Returns:
the number of configured nameservers
See also:
evdns_nameserver_add()
Return the global evdns_base created by event_init() and used by the
  other deprecated functions.
Deprecated
This function is deprecated because use of the global
  evdns_base is error-prone.
Initialize the asynchronous DNS library. This function initializes support for
  non-blocking name resolution by calling evdns_resolv_conf_parse() on
  UNIX and evdns_config_windows_nameservers() on Windows.
Deprecated
This function is deprecated because it always uses the
  current event base, and is easily confused by multiple calls to
  event_init(), and so is not safe for multithreaded use. Additionally,
  it allocates a global structure that only one thread can use. The replacement
  is evdns_base_new().
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_shutdown()
Add a nameserver. The address should be an IPv4 address in network byte order.
  The type of address is chosen so that it matches in_addr.s_addr.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_nameserver_add().
Parameters:
address an IP address in network byte order
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_nameserver_ip_add()
Add a nameserver. This wraps the evdns_nameserver_add() function by
  parsing a string as an IP address and adds it as a nameserver.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_nameserver_ip_add().
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_nameserver_add()
Parse a resolv.conf file. The 'flags' parameter determines what information is
  parsed from the resolv.conf file. See the man page for resolv.conf for the
  format of this file.
The following directives are not parsed from the file: sortlist,
    rotate, no-check-names, inet6, debug.
If this function encounters an error, the possible return values
    are: 1 = failed to open file, 2 = failed to stat file, 3 = file too large, 4
    = out of memory, 5 = short read from file, 6 = no nameservers listed in the
    file
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_resolv_conf_parse().
Parameters:
flags any of
  DNS_OPTION_NAMESERVERS|DNS_OPTION_SEARCH|DNS_OPTION_MISC| DNS_OPTIONS_ALL
filename the path to the resolv.conf file
Returns:
0 if successful, or various positive error codes if an
  error occurred (see above)
See also:
resolv.conf(3), evdns_config_windows_nameservers()
Lookup an A record for a given name.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_resolve_ipv4().
Parameters:
name a DNS hostname
flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this
  query.
callback a callback function to invoke when the request is completed
ptr an argument to pass to the callback function
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_resolve_ipv6(),
  evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
Lookup an AAAA record for a given name.
Parameters:
name a DNS hostname
flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this
  query.
callback a callback function to invoke when the request is completed
ptr an argument to pass to the callback function
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_resolve_ipv4(),
  evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
Lookup a PTR record for a given IP address.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_resolve_reverse().
Parameters:
in an IPv4 address
flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this
  query.
callback a callback function to invoke when the request is completed
ptr an argument to pass to the callback function
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_resolve_reverse_ipv6()
Lookup a PTR record for a given IPv6 address.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_resolve_reverse_ipv6().
Parameters:
in an IPv6 address
flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this
  query.
callback a callback function to invoke when the request is completed
ptr an argument to pass to the callback function
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_resolve_reverse_ipv6()
Resume normal operation and continue any suspended resolve requests. Re-attempt
  resolves left in limbo after an earlier call to
  evdns_clear_nameservers_and_suspend().
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_resume().
Returns:
0 if successful, or -1 if an error occurred
See also:
evdns_clear_nameservers_and_suspend()
Add a domain to the list of search domains.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_search_add().
Parameters:
domain the domain to be added to the search
  list
Clear the list of search domains.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_search_clear().
Set the 'ndots' parameter for searches. Sets the number of dots which, when
  found in a name, causes the first query to be without any search domain.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_search_ndots_set().
Parameters:
ndots the new ndots parameter
Set the value of a configuration option. The currently available configuration
  options are:
ndots, timeout, max-timeouts, max-inflight, and attempts
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_set_option().
Parameters:
option the name of the configuration option to be
  modified
val the value to be set
flags Ignored.
Returns:
0 if successful, or -1 if an error occurred
Shut down the asynchronous DNS resolver and terminate all active requests. If
  the 'fail_requests' option is enabled, all active requests will return an
  empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise, the
  requests will be silently discarded.
Deprecated
This function is deprecated because it does not allow the
  caller to specify which evdns_base it applies to. The recommended function is
  evdns_base_shutdown().
Parameters:
fail_requests if zero, active requests will be
  aborted; if non-zero, active requests will return DNS_ERR_SHUTDOWN.
See also:
evdns_init()