See the complaint on #4039. This doesn't fix that particular
issue (it's somewhat unrelated), but does solve around
a file parsing problem reported by @void-in
Incooperated changes as per Juan's suggestions.
- Removed redundant space option for the payload
- Doing the uri more intelligently
- Detecting allow_url_include being disabled and reporting it
- Moved to unix/webapp
- Removed redundant handler call
- Adding to description that this requires allow_url_include to be
enabled