HH-26920 add HTTP 204 support to request response fetching
HH-26920 kill get_url_retry method
HH-31250 small fixes for request/response debug display
HH-31250 fix timebars width
Merge branch 'HH-26920' into release_candidate
Merge branch 'HH-31250' into release_candidate
release 2.15.4
Merge remote-tracking branch 'origin/master' into HH-31508

Conflicts:
	debian/changelog