Merge pull request #1310 in FS/freeswitch from ~TADAMS/fs-9785:master to master

* commit 'fb46f87b076608968c49bc93af539454ab78d367':
  FS-9785: fix ./mod_conference.h:353:23: error: enumerator value for ‘EFLAG_BLIND_MEMBER’ is not an integer constant expression [-Werror=pedantic] EFLAG_BLIND_MEMBER = (1 << 31)
  FS-9785: update mod_event_multicast to work with OpenSSL 1.1.0.
  FS-9785: Fix src/switch_ivr_play_say.c:1668:48: error: ‘*’ in boolean context, suggest ‘&&’ instead [-Werror=int-in-bool-context]
  FS-9785: Fix format-truncation warnings for systems that treat it as an error.