Zabbix

.......... [DEV-2713] split zbxcomms/tls.c file into library dependent files

* commit 'dab1eea68e6a1235ced6bb6bb1d0f9e6fe924868':
  .......... [DEV-2713] fixed type conversion issue
  .......... [DEV-2713] fixed unused includes
  .......... [DEV-2713] fixed local psk cache
  .......... [DEV-2713] fixed uninitialized variable warning
  .......... [DEV-2713] fixed some style issues
  .......... [DEV-2713] moved comments to the right place
  .......... [DEV-2713] fixed introduced error
  .......... [DEV-2713] fixed various style issues
  .......... [DEV-2713] fixed tests
  .......... [DEV-2713] split zbxcomms/tls.c into library dependent files
  .......... [DEV-2713] restored src/libs/zbxcomms/tls.c
  .......... [DEV-2713] created a temporary copy of src/libs/zbxcomms/tls.c
  .......... [DEV-2713] created src/libs/zbxcomms/tls_gnutls.c as a copy of src/libs/zbxcomms/tls.c
  .......... [DEV-2713] created src/libs/zbxcomms/tls_openssl.c as a copy of src/libs/zbxcomms/tls.c