Release v0.0.6

• hexdump variables
  • $http_json_log_req_body_hexdump
  • $http_json_err_log_req_hexdump
• $ngx_stream_json_log_payload variable
• log formats moved to main config
• more info while fail to log to file
• fix compilation without stream support
• fix compilation with libjansson < 2.7.0
• arrays zero memory
• kafka bug fixing
• kafka feature check at configure
• code style fixes
• alpine docker and kafka edege update