httppeer: remove httpspeer
All it did was verify at construction time that Mercurial supports
TLS. instance() is what's used to construct peer instances. So
we can just inline this check into that function and do away with
the type variant.
Differential Revision: https://phab.mercurial-scm.org/D2216
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.