scm: add scm_cvs_command at config/configuration.yml.example (#7517).

I forgot to add it.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4798 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/configuration.yml.example

@@ -113,6 +113,7 @@ default:
   scm_subversion_command: svn                                       # (default: svn)
   scm_mercurial_command:  "\"C:\Program Files\TortoiseHg\hg.exe\""  # (default: hg)
   scm_git_command:        /usr/local/bin/git                        # (default: git)
+  scm_cvs_command:        cvs                                       # (default: cvs)
   scm_bazaar_command:     bzr.exe                                   # (default: bzr)
   scm_darcs_command:      darcs-1.0.9-i386-linux                    # (default: darcs)