highest revision on the branch (or trunk) of the magic .template file,
since doing otherwise would seem to indicate an inconsistency in
what the user is doing. Why? Templates are modified via a tag
operation of the .template file, but splitting off can only be done
via a branch operation. Subsequent mods after a branch have to happen
along a straight line.

Also allow for tag moving to initiate a template modify since the
above implied error can be corrected by doing a cvs update, and then a
retag with the -F option to move the tag.