add testcase for input of set.

Sets can be imported by not specifying $val in the add_table call.

This actually was already implemented, I just completely forgot about it.

testing/btest/Baseline/scripts.base.frameworks.input.set/out

@@ -0,0 +1,7 @@
+{
+192.168.17.7,
+192.168.17.42,
+192.168.17.14,
+192.168.17.1,
+192.168.17.2
+}

testing/btest/scripts/base/frameworks/input/set.bro

@@ -0,0 +1,46 @@
+# (uses listen.bro just to ensure input sources are more reliably fully-read).
+# @TEST-SERIALIZE: comm
+#
+# @TEST-EXEC: btest-bg-run bro bro -b %INPUT
+# @TEST-EXEC: btest-bg-wait -k 5
+# @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-sort btest-diff out
+
+@TEST-START-FILE input.log
+#separator \x09
+#fields	ip
+#types	addr
+192.168.17.1
+192.168.17.2
+192.168.17.7
+192.168.17.14
+192.168.17.42
+@TEST-END-FILE
+
+@load frameworks/communication/listen
+
+global outfile: file;
+
+redef InputAscii::empty_field = "EMPTY";
+
+module A;
+
+type Idx: record {
+	ip: addr;
+};
+
+global servers: set[addr] = set();
+
+event bro_init()
+	{
+	outfile = open("../out");
+	# first read in the old stuff into the table...
+	Input::add_table([$source="../input.log", $name="ssh", $idx=Idx, $destination=servers]);
+	Input::remove("ssh");
+	}
+
+event Input::update_finished(name: string, source:string)
+	{
+	print outfile, servers;
+	close(outfile);
+	terminate();
+	}