Fix up FreeBSD tag for files not from a vendor branch

Unexpand the tag, remove the fbsd:nokeywords property and add the
svn:keywords property.  This should eliminate the gratuituous diffs
that appear on these files in projects branches.

Sponsored by:	The FreeBSD Foundation
Queisce warning about attempting to add char * together and use explicit
array indexing to indicate what is meant to be done
Queisce warning about attempting to add char * together and use explicit
array indexing to indicate what is meant to be done