mod_deflate: Fix decompression of files larger than 4GB

gzip verification area do not contain original file size for files
larger than 4GB. It contains its size modulo 2^32 (due to only 4 bytes
reserved for such information).
This patch corrects the check, so mod_deflate is able to decompress
files with original size larger than 4GB (using same approach as gzip).
mod_proxy: Rename dirconn_entry to exclude_entry

Currently they are used for NoProxy, but could be reusable to ProxyBlock.
Rename them to something more generic.
mod_proxy: Match resolved addresses for NoProxy too

We resolve the names using the configuration parsing, thus we already have the
addresses. It could be redundant for NoProxy, but the same code could be used
with ProxyBlock if it did this.
mod_proxy: Split the NoProxy parameter parsing away

It is nice and could be reused by ProxyBlock.
mod_proxy: Share NoProxy parameter parsing and evaluation with ProxyBlock

They do the same task now, so we can remove some duplicate code. They do the
same thing except that ProxyBlock does certain things better -- they support
masked network addresses, thus we can now block subnets.