FS-5497 add sofia gateway parameter destination-prefix in case you need to send Invites to your provider with prefix only to this gateway

FS-5497 add sofia gateway parameter destination-prefix in case you need to send Invites with prefix only to this gateway

* 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.

mod_skinny: start using switch_copy_string so it uses apy_cpystrn - CID: 1214145 1214146 1214131 1214132 1214133 1214134 1214135
1214147 1214148 1214149 1214150 1214151 1214152 1214153 1214154 1214155 1214138 1214139 1214143 1214144

Forces null termination of the destination string.

Silence warning from clang-3.5 dealing with redefining the variable argv which is first defined as a function parameter