Add git support to which_scm utility

*** 49,58 ****
--- 49,59 ----
  .B which_scm
  can detect the following types of SCM systems (these are the keywords
  used in the output format):
  .nf
          cvs
+         git
          mercurial
          rcs
          sccs
          subversion
          teamware
*** 70,77 ****
--- 71,79 ----
  \fBCODEMGR_WS\fR path to current workspace.
  
  .SH SEE ALSO
  .IR cvs(1) ,
  .IR hg(1) ,
+ .IR git(1) ,
  .IR sccs(1)
  .IR svn(1) ,
  .IR workspace(1)