MFC: r252138
Add a new "-o" option to the gssd which forces gss_init_sec_context()
to use DES and the associated old style GSS initialization token.
This appears to be required for some non-FreeBSD servers to
get a kerberized NFS mount to work. Also, ignore some signals when daemonized,
which might fix the gssd from "disappearing" without leaving a core dump.
Given the tight timeframe for the FreeBSD9.2 release, I have
committed this while waiting for code review. I will commit
changes recommended by the review in a separate commit.
MFC: r252139
Document the "-o" option added by r252138.
This is a content change.
MFC: r252483
Document that NFSv4 mounts won't work if hostid_enable="NO" is set
in /etc/rc.conf because the host uuid is used to uniquely identify
the client to the server.
This is a content change.