Fail to enable 'HTTPReady' Accept filter

I get this error message after FreeBSD has booted and Apache2 has loaded.

"Fail to enable 'HTTPReady' Accept filter". It's the last line that
appears when you boot the serve.

I posted a message earlier about inconsistent server performance. Might
this be my problem?

I understand from other internet sites this relates to - The resolution
to the above problem is to a accf_http module, which function is to
buffer incoming connections until a certain complete HTTP requests
arrive, into FreeBSD kernel by using kernel linker:

kldload accf_http