Danny Hooper <hooper@google.com> [Mon, 05 Nov 2018 16:05:45 -0800] rev 40583
fix: rename :fileset subconfig to :pattern
This name was always inaccurate, since the config accepts any pattern.
Hopefully so few people use this right now that it won't matter, but there will
now be a warning if the old config name is used.
Differential Revision: https://phab.mercurial-scm.org/D5226