Fixes #1596: Use quote for DBUtil::process_fields default value
Fix Using AFTER and COMMENT in correct order in DBUtil
Merge pull request #1597 from laurent35240/1.8/develop

Fix Using AFTER and COMMENT in correct order in DBUtil
Apply chmod on every Config_File->save(), remove specific chmod on crypt config
when the key passed is an object, cast it to string
Merge pull request #1598 from felixgilles/pr/chmod_on_config_files

Apply chmod on every Config_File->save(), remove specific chmod on crypt config
remove the limitation on separator selection. related fuel/orm#324
fixed pagination start page calculation
second attempt at fixing pagination start/end calculation
added pagination link offset; fixed pagination tests
added input validation to pagination
added missing config file extension