CI: test transports

This is sanity check to verify that UDP/TCP/TLS transport work at least in the simplest possible setup.

Currently master branch contains a bug which causes intermittent failures with following assertion failure: daemon/io.c:51: session_clear: Assertion `s->outgoing || s->tasks.len == 0'

We have to fix this!

ci/respdiff/kresd.config

@@ -3,6 +3,8 @@
 -- Listen on localhost and external interface
 net.listen('127.0.0.1', 5353)
 net.listen('::1', 5353)
+net.listen('127.0.0.1', 8853, { tls = true })
+net.listen('::1', 8853, { tls = true })
 
 -- Auto-maintain root TA
 trust_anchors.file = '.local/etc/kresd/root.keys'
@@ -21,5 +23,4 @@ modules = {
 	'stats',    -- Track internal statistics
 }
 
-
 verbose(false)