effect that _gss_mechs and _gss_mech_oids is only initialized once, so
if just the users of these two global variables calls _gss_load_mech()
first, it will act as a barrier and make sure the variables are never
changed and we don't need to lock them.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@17842 ec53bebd-3082-4978-b11e-865c3cabbd6b
c8823f15de