Fix issue #1206392 by agentrickard: Move the configuration path for D7. Also fix the `Locked Documents' tab of the content administration pages to be accessible.

Fix discrepency between administration page's instructions and the operations column of the lock listing.

Revert "Fix issue #1206392 by agentrickard: Move the configuration path to the Content management section."

This reverts commit c90bf5f9.

Fix issue #1130220 by Zombienaute, halcyonCorsair: Content is not unlocked when navigating away from the page (javascript error) for nginx.

Use more sane defaults for content_lock_timeouts: 30 minutes before locks are broken and enable cron-less lock-breaking by default.

Issue #1183678 reported by Eric Yang: Check that a node has a body before trying to check its input format.

Fixes Notice: Undefined property: stdClass:: in content_lock_content_lock_node_lockable() in line 697 of content_lock.module.

Enable the 'check out documents' permission by default for autenticated users, matching the most common use-case.

Issue #1183018 reported by rodrigoaguilera: can't install (double-installation of content_lock database schema causes exception).

Restore node format discrimination support thanks to helpful comments in http://drupal.org/node/889058.