cvs: Remove info pages (one converted to man page)

cvs: Remove info pages (one converted to man page)

As the start of an effort to remove info pages and texinfo from the
system, the cvsclient info page has been converted to a man page.
The cvs info page was not converted since it appears to be equivalent
to the already existing man page.

Entries were added to Makefile_upgrade.inc, but when all the info pages
are gone, those entries will be replaced by a single directory line -
to remove /usr/share/info