Added cron shell disable feature

  New feature allow admin to decide if user can run any commands or
only schedule url loads. In a hosting with random clients enabling
users to run shell commands is highly discouraged.
  Database schema is modified, updatelib modified accordingly.
  Defaults to Off.
Better working solution for cron shell access
Even better Cron shell ACL

 Put it together with Will (Shazar) :)
 Now unpriviledged user may run php and wget (without - options).
E_STRICT change

  I just missed it from my tree somehow.
Added exception message
Merge pull request #65 from semirke/6.1.x

Cron shell disable. Project issue #1082
Project issue #949 - Hardcode 0.0.0.0 for the time being. Kloxo development does have this code refactored.
 call_user_func_array behaviour changed in php 5.3
Merge pull request #66 from semirke/6.1.x

Fix #1083
Merge branch '6.1.x' of https://github.com/lxcenter/kloxo into 6.1.x
Merge pull request #67 from dterweij/6.1.x

Project issue #949 - Hardcode 0.0.0.0 for the time being.
Version Bump to 6.1.15.
Merge pull request #68 from dterweij/6.1.x

Version Bump to 6.1.15.
Fixing open recursor issue after install
Merge pull request #69 from semirke/6.1.x

Fixing open recursor issue after install
Make sure open DNS recursives are denied (already inside 6.1.15 release)
Merge pull request #70 from dterweij/6.1.x

Make sure open DNS recursives are denied (already inside 6.1.15 release)
Merge pull request #71 from lxcenter/6.1.x

Make master 6.1.15