Convert browserautopwn's MATCH and EXCLUDE options to OptRegexp

These are regexes and should be OptRegexp object.

##### Verification is quick:
- [ ] 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

- [ ] 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`