Add RFC4791 MKCALENDAR method
Changed extract_limit in class Column to return correct mysql float and double limits
Merge pull request #14791 from asn62/mysql_double_bug

Changed extract_limit in class Column to return correct mysql float and
double limits
Merge pull request #15121 from skarpesh/rfc4791-methods

Add RFC 4791 MKCALENDAR method
fixes stack level too deep exception on action named 'status' returning 'head :ok'
Merge pull request #15118 from khelben/head_with_status_action_stack_level_too_deep

fixes stack level too deep exception on action named 'status' rendering 'head :ok'
formatting pass through CHANGELOGS. [ci skip]
Test that AR::Relation#size plays well with .distinct(foo, bar).
WIP various implementations of AR::Relation#size.