Regexp mess?

[Tim Bray]

Why are the regex-related routine declarations splashed across  
httpd.h and ap_regex.h?  And why are there two versions of regcomp,  
only one of which takes a pool for allocation?  And why are they ap_  
instead of apr_?  And why is it so hard to find any documentation on  
them?  Fortunately the code is pretty easy to read... -Tim