Test the GPG extension

  $ "$TESTDIR/hghave" gpg || exit 80

  $ cat <<EOF >> $HGRCPATH

  > [extensions]

  > gpg=

  > 

  > [gpg]

  > cmd=gpg --no-permission-warning --no-secmem-warning --homedir $TESTDIR/gpg

  > EOF

  $ hg init r

  $ cd r

  $ echo foo > foo

  $ hg ci -Amfoo

  adding foo

  $ hg sigs

  $ hg sign 0

  Signing 0:e63c23eaa88a

  $ hg sigs

  hgtest                             0:e63c23eaa88ae77967edcf4ea194d31167c478b0

  $ hg sigcheck 0

  e63c23eaa88a is signed by:

   hgtest