Proposed commit log message:
```
Mk/bsd.options.desc.mk: Add moreGIT and MERCURIAL descriptions
- Add BZR description
- Add CVS description
- Add GIT description
- Add HG description
- Add RsyncMERCURIAL description
Reviewed_by: koobs
Approved by: koobs (mentor)
Differential_Revision: D17459
```