Description:
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As per #51723, the content-length header is limited to 2GB - however it need not be.
If Apache 2.2 is built with -DLARGEFILE_SOURCE -DFILE_OFFSET_BITS=64 then apr_off_t is an off64_t, however the conversion in the calls to ap_set_content_length uses strtocol (hence limited to the 32-bit long on Linux 32), but if strtocoll is used instead to return a 64-bit long long, the header is set correctly for values > 2GB.

The attached patch is of the adjustment, I guess the configure script generation needs to be updated to establish whether apr_off_t is long or long long.

Test script:
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<?php
header("Content-Length: 10000000000");
?>


Expected result:
----------------
A header:
Content-Length: 10000000000

Actual result:
--------------
A header:
Content-Length: 2147483647