Changes since version 2.3-dev7 :

Willy Tarreau (5):
      MINOR: backend: replace the lbprm lock with an rwlock
      MINOR: lb/map: use seek lock and read locks where appropriate
      MINOR: lb/leastconn: only take a read lock in fwlc_get_next_server()
      MINOR: lb/first: use a read lock in fas_get_next_server()
      MINOR: lb/chash: use a read lock in chash_get_server_hash()