Merge branch 'jk/no-perl-tests' into maint

Some tests that depend on perl lacked PERL prerequisite to protect
them, breaking build with NO_PERL configuration.

* jk/no-perl-tests:
  t960[34]: mark cvsimport tests as requiring perl
  t0090: mark add-interactive test with PERL prerequisite

t/t0090-cache-tree.sh

@@ -131,7 +131,7 @@ test_expect_success 'second commit has cache-tree' '
 	test_cache_tree
 '
 
-test_expect_success 'commit --interactive gives cache-tree on partial commit' '
+test_expect_success PERL 'commit --interactive gives cache-tree on partial commit' '
 	cat <<-\EOT >foo.c &&
 	int foo()
 	{

t/t9603-cvsimport-patchsets.sh

@@ -16,7 +16,7 @@ test_description='git cvsimport testing for correct patchset estimation'
 
 setup_cvs_test_repository t9603
 
-test_expect_failure 'import with criss cross times on revisions' '
+test_expect_failure PERL 'import with criss cross times on revisions' '
 
     git cvsimport -p"-x" -C module-git module &&
     (cd module-git &&

t/t9604-cvsimport-timestamps.sh

@@ -5,7 +5,7 @@ test_description='git cvsimport timestamps'
 
 setup_cvs_test_repository t9604
 
-test_expect_success 'check timestamps are UTC (TZ=CST6CDT)' '
+test_expect_success PERL 'check timestamps are UTC (TZ=CST6CDT)' '
 
 	TZ=CST6CDT git cvsimport -p"-x" -C module-1 module &&
 	git cvsimport -p"-x" -C module-1 module &&
@@ -34,7 +34,7 @@ test_expect_success 'check timestamps are UTC (TZ=CST6CDT)' '
 	test_cmp actual-1 expect-1
 '
 
-test_expect_success 'check timestamps with author-specific timezones' '
+test_expect_success PERL 'check timestamps with author-specific timezones' '
 
 	cat >cvs-authors <<-EOF &&
 	user1=User One <user1@domain.org>