Removed useless comments
Merge branch 'MAX-324' of https://github.com/mariadb-corporation/MaxScale into MAX-324

Conflicts:
	server/modules/routing/dbshard/dbshard.c
Merge branch 'MAX-324' of https://github.com/mariadb-corporation/MaxScale into MAX-324

Conflicts:
	server/modules/routing/dbshard/dbshard.c
poll.c:poll_add_event_to_dcb did not increase the pollStats.evq_pending counter which caused it to go negative, which, inturn caused all threads to spinloop with minimal timeout.
Merge branch 'MAX-324' of https://github.com/mariadb-corporation/MaxScale into MAX-324