Merge pull request #478 from diraimondo/master

scraping season/episode numbers for sky-it
Webui: restore channel tag functionality to EPG query and autorec
Merge pull request #480 from ProfYaffle/master

Webui: restore channel tag functionality to EPG query and autorec
scanfile: add support for new linux dvb file format
intlconv: Do not free alloca-ted string
avahi: make sure that mallocated path is freed
DVR: Fix the autorec minduration/maxduration
WEBUI: Do not show the access state if --noacl is active
service: fix the mutex deadlock at shutdown in service_saver() thread fcn
extraction of subtitle (episode title) from the summary of sky-it EPG

(the regexp looks garbled because single quote can even occur in the subtitle and I don't want to introduce pcre dependency)