In RT5 documentation, it is stated that RT only works with MPM prefork.
However, when starting apache with mpm prefork, there is a warning:
AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
Disabling support for mpm prefork appears to be effected by Apache about 7 years ago so I am wondering if the RT5 documentation is still correct or does RT5 support the use of MPM event currently?