show custom variables in service details when only one host is shown
fixed undefined value
extra request for cust vars only when enabled
fixed undef value
hoststats is not always set
Merge branch 'integration' of github.com:sni/Thruk into integration

Conflicts:
	lib/Thruk/Controller/status.pm
fixed docs make target
Merge branch 'master' into integration
added missing newline in services availability
conf: save & reload did show changed files which were already saved
Merge branch 'integration'
updated changes