Code style & docs.
Lang code restructure from 1c9f455c, applied to Drupal6.php
Update CRM_Utils_System_Drupal6::loadBootStrap() based on CRM_Utils_System_Drupal::loadBootStrap().
Suppress E_NOTICE errors because we can end up with corrupted JSON from Drupal init.
Merge pull request #1131 from GiantRobot/4.3-CRM-13017

CRM-13017