free the cont data before destroying the cont
captcha-challenge: fix browser issues

- use protocol relative version of jquery
- prevent caching of intercepted responses
Merge pull request #9 from equalitie/oschaaf-captcha-fixes

captcha-challenge: fix browser issues
deal with lack of HTTP header fields gracefuly
few indicator here and there to track the half dead connections
ip db locks after it finds the ip in the map
fast forward shites