* [fix] sanitize filters and or_filters to avoid sql injection
* add test cases for filter sanitizer
* codacy fix
* added test cases to test valid scenarios
After execution of a bulk rename, the help cache for the particular
doctype didn't used to change. Added this fix to ensure the help is
rebuilt for the particular doctype whose docs have been renamed
* [fix] sanitize fields to avoid mysql injection
* sanitize sql statements to avoid subqueries
* Added test cases
* Raise exception if mysql injection found in fields and related test-cases
* [fix] riase exception if blacklistes function or keyworkds found in fields
* [fix] while deleting a record also check links in single
* [fix] no HTML in translatable text
* [fix] commonified message for link validation on document delelte
* Removed comment_type 'updated'
* New doctype activity log
* Moved feed.py to activity_log
* Updated feed gets stored in activity_log
* Activity page fetches feed from activity_log
* feed match condition change
* modified
* modified hooks.py
* modified sessions.py
* patch added
* naming in patch
* moved login, logout feed to activity_log
* changes in auth.py, hooks.py
* deleted doctype authentication_log and added test cases
* added utils.py in core
* moved some methods from communication.py to utils.py
* added PyMYSQL instead mysqlclient-python
* added pymysql import
* fixed db module import
* foxed self._conn wrapper
* updated cursor migration
* removed existent converters
* some more fixes towards API port
* modified travis
* updated doctype and revereted yml
* modified travis
* refreshed logging
* raw fix
* moved from hard coded constants to declarable instances
* moved from hard coded constants to declarable instances
* refactoring and logging
* moved to global import declaration
* fixed codacy
* unfixed codacy
* minor fix
* binary_type has a single
* deprecated alternative
* merged with latest
* fixed merge conflicts
* using deprecated alternative
* raw fix
* stupid fix
* using StringTypes instead
* brutal hack
* log
* tundebazy to the rescue
* fixed content_hash error
* frappe/database.py
* frappe/database.py
* updated database.py
* updated requirements
* updated requirements
* fixed codacy
* fixed codacy
* moved from DatabaseOperationalError to pymysql.InternalError
* moved from DatabaseOperationalError to pymysql.InternalError
* fixed codacy
* empty commit
* fixed codacy
* fixed codacy