Match on all criteria even if con_id or con_mark are given.

Previously, if a match specification contained the con_id or con_mark criterion,
all other criteria were ignored. However, a user may want to specify one of
those two unique identifiers and still specify others as well, for example to
match the currently focused window, but only if it has a certain WM_CLASS:

    [con_id=__focused__ class=special] kill

We now check all specified criteria.

fixes #2111

testcases/t/261-match-con_id-con_mark-combinations.t

@@ -0,0 +1,51 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+#
+# Ticket: #2111
+use i3test;
+
+my ($ws);
+
+###############################################################################
+# Verify that con_id can be combined with other criteria
+###############################################################################
+
+$ws = fresh_workspace;
+open_window(wm_class => 'matchme');
+
+cmd '[con_id=__focused__ class=doesnotmatch] kill';
+is(@{get_ws($ws)->{nodes}}, 1, 'window was not killed');
+
+cmd '[con_id=__focused__ class=matchme] kill';
+is(@{get_ws($ws)->{nodes}}, 0, 'window was killed');
+
+###############################################################################
+# Verify that con_mark can be combined with other criteria
+###############################################################################
+
+$ws = fresh_workspace;
+open_window(wm_class => 'matchme');
+cmd 'mark marked';
+
+cmd '[con_mark=marked class=doesnotmatch] kill';
+is(@{get_ws($ws)->{nodes}}, 1, 'window was not killed');
+
+cmd '[con_mark=marked class=matchme] kill';
+is(@{get_ws($ws)->{nodes}}, 0, 'window was killed');
+
+###############################################################################
+
+done_testing;