tests/narrow-library.sh

packaging: let Debian package depends on sensible-utils

This fixes the following Lintian error:

  E: mercurial-common: missing-depends-on-sensible-utils etc/mercurial/hgrc.d/default-tools.rc

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