Cleanups to prepare for mo/cvs-server-updates.
* mo/cvs-server-cleanup:
Use character class for sed expression instead of \s
cvsserver status: provide real sticky info
cvsserver: cvs add: do not expand directory arguments
cvsserver: use whole CVS rev number in-process; don't strip "1." prefix
cvsserver: split up long lines in req_{status,diff,log}
cvsserver: clean up client request handler map comments
cvsserver: remove unused functions _headrev and gethistory
cvsserver update: comment about how we shouldn't remove a user-modified file
cvsserver: add comments about database schema/usage
cvsserver: removed unused sha1Or-k mode from kopts_from_path
cvsserver t9400: add basic 'cvs log' test