Convert browserautopwn's MATCH and EXCLUDE options to OptRegexp

These are regexes and should be OptRegexp object.

##### Verification is quick:
- [x] Ensure MATCH still works

        msf> use auxiliary/server/browser_autopwn
        msf> set MATCH osx/browser/safari_metadata_archive
        msf> set ACTION list
        msf> set LHOST 0.0.0.0
        msf> run

- [x] Prints one exploit: `osx/browser/safari_metadata_archive`
- [ ] Ensure EXCLUDE still works

        msf> use auxiliary/server/browser_autopwn
        msf> unset MATCH
        msf> set EXCLUDE osx/browser/safari_metadata_archive
        msf> set ACTION list
        msf> set LHOST 0.0.0.0
        msf> run

- [ ] Should NOT print exploit `osx/browser/safari_metadata_archive`