tests/narrow-library.sh

persistent-nodemap: disable it for test-wireproto-content-redirects.t

This is not relevant for the test and this will avoid a lot of variations.

Differential Revision: https://phab.mercurial-scm.org/D10338

cat >> $HGRCPATH <<EOF
[extensions]
narrow=
[ui]
ssh=$PYTHON "$RUNTESTDIR/dummyssh"
[experimental]
changegroup3 = True
EOF