RSM

...G...PS. [ZBX-8914] replaced zbx_tcp_recv_ext() function with a new one:
  - inputs like <HEADER><DATALEN><DATA>, plain text and XML protocol are still supported;
  - new function reads in bigger blocks and uses less system calls;
  - new function is tolerant to fragmented <HEADER><DATALEN> and XML header when called without ZBX_TCP_READ_UNTIL_CLOSE flag;
  - new function fails and logs a warning if <DATALEN> does not equal <DATA> length or plain text size limit is exceeded.