This means that we shouldn't try to connect using IPv6 if the local machine
doesn't have an IPv6 address itself.
This also simplifies the IPv6 code in BX_connect_by_number() a bit.
git-svn-id: svn://svn.code.sf.net/p/bitchx/code/trunk@203 13b04d17-f746-0410-82c6-800466cd88b0
connect_by_number(). Make function static since it is only used in one
source file.
git-svn-id: svn://svn.code.sf.net/p/bitchx/code/trunk@145 13b04d17-f746-0410-82c6-800466cd88b0