Fossil

** probably complain that no such revision was found. However
**
**   fossil update tag:decaf
**
** will assume that "decaf" is a tag/branch name.
**
** only allow --date-override and --user-override in 
**   %fossil tag add --date-override 'YYYY-MMM-DD HH:MM:SS' \
**   %fossil tag add --date-override 'YYYY-MMM-DD HH:MM:SS' \\
**                   --user-override user 
** in order to import history from other scm systems
*/
void tag_cmd(void){
  int n;
  int fRaw = find_option("raw","",0)!=0;
  int fPropagate = find_option("propagate","",0)!=0;