- Removed hybrid 6 leftovers


git-svn-id: svn://svn.ircd-hybrid.org/svnroot/ircd-hybrid/branches/8.2.x@4777 82007160-df01-0410-b94d-b575c5fd34c7
- send.c, client.h: changed Connection::serial to an uint64_t 


git-svn-id: svn://svn.ircd-hybrid.org/svnroot/ircd-hybrid/branches/8.2.x@4779 82007160-df01-0410-b94d-b575c5fd34c7