Patched lxrestart to escape hell arguments
Revert "Patched lxrestart to escape hell arguments"

This reverts commit 31fe828d8c98df09297992c2ed96465d2f406d4c.
Replaced escaping by exact check.

  As of current knowledge, lxrestart should never run anyting else.
Removed lxrestart

 I have not found any references to it (except installing it).
Wrong PHP pad type used

  Somehow there was STRPADLEFT instead of STR_PAD_LEFT
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.
Merge pull request #54 from semirke/dev

Removed lxrestart && added cron shell change to wget