questions on $r->lookup_uri

[princepawn]

1 - Why was no documentation for this method found in the manpage for
Apache::Request? Where should I have looked for docs on this?

2 - I did manage to find some docs for this in Ch. 4 of the
Stein/Maceachern book, but am wondering why lookup_uri() goes through
all phases of request processing up to but not including the content
handler. It would seem that looking up a URI would only need to go
through the URI translation phase of the subrequest to lookup a URI.