gcc warnings after upgrading mosquitto to 2.1.2

In file included from mqtt.h:36,
                 from logfile.h:26,
                 from sbbs.h:298,
                 from js_conio.cpp:26:
/usr/include/mqtt_protocol.h:2:2: warning: #warning "Please replace '#include <mqtt_protocol.h> with #include <mosquitto.h>" [-Wcpp]
    2 | #warning "Please replace '#include <mqtt_protocol.h> with #include <mosquitto.h>"
      |  ^~~~~~~

Seems to occur anywhere mqtt_protocol.h is called.