test-inotify-issue1542.t: migrate to killdaemons from kill `cat pidfile`

test-inotify-issue1371.t: switch to killdaemons from kill `cat pidfile`

test-inotify-debuginotify.t: migrate to killdaemons from kill `cat pidfile`

test-hgweb-raw.t: use killdaemons instead of kill `cat pidfile`

test-https.t: stop using kill `cat $pidfile`

changelog: hexlify node when throwing a LookupError on a filtered node The non-hexlified node was leaking all the way out to the web interface, and wasn't consistent with the behavior for nonexistent nodes.

byterange: remove old two-arg raise trick We don't care about the original traceback, and this was frustrating any efforts to make the code work on Python 3.3.