Install support for X-Failure call-back URL.

To be called when par2 verification fails, the RAR files have CRC errors or the right password isn't known.
Set new_nzb_on_failure option default off.
Fix little problem in extension detection and fix some PyLint complaints.
Using priority "Force" will override the duplicate NZB check.

Will work when manually entering an NZB.
Prevent crash in unpacking due to unset variable.
We're now on 0.7.x, and developing 0.8.x
Merge pull request #160 from sanderjo/0.7.x

We're now on 0.7.x, and developing 0.8.x
Implement support for X-Failure call-back URL.

Optionally to be called when par2 verification fails, the RAR files have CRC errors or the right password isn't known.
Update text files for 0.7.18RC1
Additional logging for folder renaming.
Update main POT file.
Prevent false positives for encryption detection.

Weird posts with double rar-ed subtitles.
Prevent false encryption messages.

Probably not encrypted when multiple files are in a RAR.
Use default-path in Plush cookies.

Cookies are not port specific. When sending cookies with path=/ to
http://localhost:8090/sabnzbd/ these cookies also turn up when
requesting e.g. http://localhost/apache2 or http://localhost:8080/tomcat and so on.

To avoid polluting the global cookie space, simply do not specify a path
when setting the cookie. This will result in a cookie with the default-path,
i.e. path=/sabnzbd for http://localhost:8090/sabnzbd.
Set pwd to none when empty
Handle server side 5xx problems
Merge pull request #164 from sanderjo/0.7.x

Handle server side 5xx problems more nicely
Fix bug that prevented multiple sets in one NZB from joining.
Don't pass seemingly "joinable" files to par2. No longer needed since we use a wildcard.

Can lead to problems on Windows due to a potentially huge amount of parameters.
No longer needed since we're using the wild-card parameter nowadays.
Logs in which rar file unwanted extension