Removed --with-ipv6 configure option so it determines IPv6 availablity

completely on it's own per suggestion by Karl


git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@415 f882894a-f735-0410-b71e-b25c423dba1c

configure.in

@@ -300,12 +300,6 @@ AC_ARG_WITH(openssl,
 		[sets path to openssl installation]),
 	OPENSSL=$withval,)
 
-AC_ARG_WITH([ipv6],
-              ACX_HELP_STRING([--with-ipv6],
-                             [enable IPv6 support (default=no)]),
-              ,
-              with_ipv6=no)
-
 dnl Check for AF_INET6 support
 AC_CACHE_CHECK([for IPv6 support], with_ipv6, [
 	AC_TRY_COMPILE([#include <netinet/in.h>