* commit 'd1abf274':
  REFER_EVENT is missing from the message names array

* commit '4d0b875d':
  fix mod_fifo presence https://jira.freeswitch.org/browse/FS-6732

usleep is deprecated and disabled in glibc 2.12 unless requested. Use
nanosleep instead if available.

This fixes the following compiler warning:

    ./src/zrtp_iface_scheduler.c: In function 'zrtp_sleep':
    ./src/zrtp_iface_scheduler.c:96:2: warning: implicit declaration of
    function 'usleep' [-Wimplicit-function-declaration]
      usleep(msec*1000);
      ^

These two files should only be built when OpenSSL is not enabled. See
the configure script of the original sources and Makefile from upstream.
(RNG_EXTRA_OBJS)

Fixes a -Wimplicit-function-declaration warning.

* commit '05ef1894':
  add uptime api to mod_commands

* commit 'b60df39b':
  mod_http_cache: fix configuration so that carriage returns or other whitespace is OK around S3 keys
  mod_http_cache: fixed S3 URL parser to allow mybucketsubdomain.com.s3.amazonaws.com

https://jira.freeswitch.org/browse/FS-6732

* commit 'fe2a6e8a':
  FS-6620 mod_blacklist fix not deleting entries from list

REFER_EVENT has been added to switch_core_session_message_types_t
a while ago, but was never added to the message_names[] related array.