It has been impossible to have more than one InspIRCd* object in the
same address space for some time now, and this feature was never used.
This formalizes class InspIRCd as a singleton object.
git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@11703 e03df62e-2008-0410-955e-edbf42e46eb7