Add a mapping function which converts sequential integers to a sequence
in which most of the digits change each time, but without significantly
increasing the length.
Change-Id: I1011a96894fbf0b92d20a96149e68014f53e3c3c
Add services and utilities for automatic creation of temporary user
accounts on page save, in order to avoid exposing the user's IP
address.
* Add $wgAutoCreateTempUser, for configuring the system
* Add TempUserConfig service, which interprets the config.
* Add TempUserCreator service, which creates users during page save as
requested by EditPage. With proxy methods to TempUserConfig for
convenience.
* Add table user_autocreate_serial. Table creation is necessary before
the feature is enabled but is not necessary before deployment of this
commit.
Bug: T300263
Change-Id: Ib14a352490fc42039106523118e8d021844e3dfb
