tests: add .sh and .pl suffixes to shell and perl tests, respectively

Not only this shrinks the size of the generated Makefile (from > 6300
lines to ~3000), but will allow further simplifications in future
changes.

* tests/Makefile.am (TEST_EXTENSIONS): Add '.sh' and '.pl'.
(PL_LOG_COMPILER, SH_LOG_COMPILER): New, still defined simply to
$(LOG_COMPILER) for the time being.
(TESTS, root_tests): Adjust as described.
* All tests: Rename as described.

tests/chown/basic.sh

@@ -0,0 +1,59 @@
+#!/bin/sh
+# make sure chown --from=... works
+
+# Copyright (C) 2001-2012 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+print_ver_ chown
+require_root_
+
+touch f || framework_failure_
+
+chown -R --preserve-root 0:1 f
+
+# Make sure the owner and group are 0 and 1 respectively.
+set _ $(ls -n f); shift; test "$3:$4" = 0:1 || fail=1
+
+# Make sure the correct diagnostic is output
+# Note we output a name even though an id was specified.
+chown -v --from=42 43 f > out || fail=1
+printf "ownership of 'f' retained as $(id -nu)\n" > exp
+compare exp out || fail=1
+
+# Ensure diagnostics work for non existent files.
+chown -v 0 nf > out && fail=1
+printf "failed to change ownership of 'nf' to 0\n" > exp
+compare exp out || fail=1
+
+chown --from=0:1 2:010 f || fail=1
+
+# And now they should be 2 and 10 respectively.
+set _ $(ls -n f); shift; test "$3:$4" = 2:10 || fail=1
+
+ln -s f slink
+# Applying chown to a symlink with --no-dereference
+# should change only the link.
+chown --no-dereference 0:1 slink || fail=1
+# owner/group on the symlink should be set
+set _ $(ls -n slink); shift; test "$3:$4" = 0:1 || fail=1
+# owner/group on the referent should remain unchanged
+set _ $(ls -n f);     shift; test "$3:$4" = 2:10 || fail=1
+
+chown --no-dereference --from=0:1 2:010 slink || fail=1
+# owner/group on the symlink should be changed
+set _ $(ls -n slink); shift; test "$3:$4" = 2:10 || fail=1
+
+Exit $fail