#6 content-length header is mishandled

[Ken Lalonde]

RFC 2616 says HTTP headers are case-insensitive.
Mod_gzip 1.3.26.1a does not ignore case on the first
letter of the header. The effect is that, if the
response contains the (legal) header:
content-length: 123
mod_gzip will pass it through, and add its own
Content-Length header.

The attached patch simply checks for both cases when
examining the first character of the header line.

[Ken Lalonde]

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Oops, forgot the patch...

[Ken Lalonde]

Patch to mod_gzip-1.3.26.1a/mod_gzip.c