upgrade: rename actions to upgrade_actions
The `actions` were a list of optimizations and format upgrades which will be
upgraded. This does not include things which will be downgraded.
Let's rename the variable for clarity. It now makes obvious that we don't have
any concrete information on what things are downgraded.
Differential Revision: https://phab.mercurial-scm.org/D9616
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install::
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing::
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.