liblogging rename
adapt to liblogging 1.0.1
ompgsql bugfix: improper handling of auto-backgrounding mode
correcting a slightly wrong code location

did have no effect, but could cause trouble with future plugin
interface changes.
update ChangeLog
ompgsql: remove unnecessary connetion open/close at startup
json templates are improperly created

See also: https://github.com/rsyslog/rsyslog/issues/27
maintain ChangeLog
prepare for 7.4.10 release
Merge branch 'v7-stable' into v7-devel

Conflicts:
	ChangeLog
	configure.ac
	doc/manual.html
prepare for 7.6.0
Merge branch 'v7-stable'

Conflicts:
	ChangeLog
	configure.ac
	doc/manual.html
	plugins/ompgsql/ompgsql.c