CRM-12856 - CRM_Core_Lock - Autoformat
CRM-12856 - CRM_Core_Lock - Quieter logs

The log is very noisy (adding several log lines on most page requests). This
might be useful for debugging lock issues, but that's a developer task, so
we'll only do it if CIVICRM_LOCK_DEBUG is defined.
Merge pull request #3536 from totten/4.4-12856

CRM-12856 - Cleanup