Ticket History #6891: Add gss_userok and gss_pname_to_uid

Resurrect gss_userok and gss_pname_to_uid in the mechglue. Add krb5
mech implementations using krb5_kuserok and krb5_aname_to_localname,
as well as mechanism-independent implementations based on name
attributes.

From r24710, r24715, r24717, r24731, r24732, r24733, r24734, r24735,
r24747, r24816, and r24819 in users/lhoward/moonshot-mechglue-fixes,
with minor edits.


https://github.com/krb5/krb5/commit/e2c6d09c74ed23e72755d6bc94f3844b0bd3d1eb
Commit By: ghudson
Revision: 24836
Changed Files:
U trunk/src/appl/gss-sample/gss-server.c
U trunk/src/lib/gssapi/generic/gssapi_ext.h
U trunk/src/lib/gssapi/generic/gssapi_generic.c
U trunk/src/lib/gssapi/krb5/gssapi_krb5.c
U trunk/src/lib/gssapi/libgssapi_krb5.exports
U trunk/src/lib/gssapi/mechglue/Makefile.in
U trunk/src/lib/gssapi/mechglue/g_userok.c
U trunk/src/lib/gssapi/mechglue/gssd_pname_to_uid.c
U trunk/src/lib/gssapi/mechglue/mglueP.h
U trunk/src/lib/gssapi/spnego/spnego_mech.c

Implement gss_authorize_localname, as discussed on the kitten list,
and make gss_userok a wrapper around it matching the Gnu GSS
prototype. The SPI for gss_authorize_localname doesn't match the API
since we have no way of representing the contents of an internal name
to a mech at the moment. From r24855, r24857, r24858, r24862, r24863,
r24864, r24866, r24867, and r24868 in
users/lhoward/moonshot-mechglue-fixes.


https://github.com/krb5/krb5/commit/8b62abaa08ba814ce45bde12d8798d3a6e58c209
Commit By: ghudson
Revision: 24869
Changed Files:
U trunk/src/lib/gssapi/generic/gssapi_ext.h
U trunk/src/lib/gssapi/krb5/gssapi_krb5.c
U trunk/src/lib/gssapi/libgssapi_krb5.exports
U trunk/src/lib/gssapi/mechglue/Makefile.in
A trunk/src/lib/gssapi/mechglue/g_authorize_localname.c
U trunk/src/lib/gssapi/mechglue/g_initialize.c
D trunk/src/lib/gssapi/mechglue/g_userok.c
U trunk/src/lib/gssapi/mechglue/mglueP.h