dmmp_strerror - Convert error code to string.

       rc          int.  Return  code  by libdmmp functions. When provided error code is not a valid error code,
                   return "Invalid argument".

       Convert error code (int) to string (const char *):

       * DMMP_OK -- "OK"

       * DMMP_ERR_BUG -- "BUG of libdmmp library"

       * DMMP_ERR_NO_MEMORY -- "Out of memory"

       * DMMP_ERR_IPC_TIMEOUT -- "Timeout when communicate with multipathd, try to set bigger timeout value  via
       dmmp_context_timeout_set ()"

       * DMMP_ERR_IPC_ERROR -- "Error when communicate with multipathd daemon"

       * DMMP_ERR_NO_DAEMON -- "The multipathd daemon not started"

       * DMMP_ERR_INCOMPATIBLE -- "The multipathd daemon version is not compatible with current library"

       * Other invalid error number -- "Invalid argument"

       dmmp_strerror - Convert error code to string.

       const char *. The meaning of provided error code.

March 2018                                        dmmp_strerror                                 dmmp_strerror(3)

constchar*dmmp_strerror(intrc);