Add support for <missing> expression check - new procedure Match_Missing to check if a line matches   a missing pattern - reject the patch if the <missing> expression matches the line - add support to make a patch optional - evaluate the <missing> expressions by using the generator   EL context
Add support for <missing> expression check
- new procedure Match_Missing to check if a line matches
  a missing pattern
- reject the patch if the <missing> expression matches the line
- add support to make a patch optional
- evaluate the <missing> expressions by using the generator
  EL context


stcarrez/dynamo,stcarrez/dynamo,stcarrez/dynamo