sslutil: rename 'minimumprotocolui' -> 'minimumprotocol'
Before, both 'minimumprotocolui' and 'minimumprotocol' were used, but meaning
the same.
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}