Explictly set kerberos_stash to NO instead of blank. While we are at it, fix a comment that suggested setting ipv6_ipv4mapping to blank. This will aid in merging with rcng which requires all veriables to be explicitly set.
Explictly set kerberos_stash to NO instead of blank. While we are at it,
fix a comment that suggested setting ipv6_ipv4mapping to blank. This
will aid in merging with rcng which requires all veriables to be
explicitly set.

Submitted by:	Mike Makonnen
MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase