- Cleaned up UID introduction / NICK change related code


git-svn-id: svn://svn.ircd-hybrid.org/svnroot/ircd-hybrid/trunk@4088 82007160-df01-0410-b94d-b575c5fd34c7
- m_nick.c:perform_uid_introduction_collides(): removed useless IsServer() test


git-svn-id: svn://svn.ircd-hybrid.org/svnroot/ircd-hybrid/trunk@4089 82007160-df01-0410-b94d-b575c5fd34c7