hgweb: remove wsgirequest.read()
This was just a proxy to self.inp.read(). This method serves little
value. Let's nuke it.
Callers in the wire protocol server have been updated accordingly.
Differential Revision: https://phab.mercurial-scm.org/D2748
cat >> $HGRCPATH <<EOF
[extensions]
narrow=
[ui]
ssh=python "$TESTDIR/dummyssh"
[experimental]
changegroup3 = True
EOF