I just finished configuring Apache and would like to clean up some error messages before continuing with the development of my website.

How can I clean-up there messages:
[Fri Nov 20 18:12:24 2009] [warn] Init: Session Cache is not configured [hint: SSLSessionCache]
[Fri Nov 20 18:12:25 2009] [error] Failed to change_hat to 'HANDLING_UNTRUSTED_INPUT'
Also, how do I configure Apache to not write duplicate errors?