[PATCH 2/2] BUG/MINOR: http-htx: Just warn if payload of an errorfile doesn't match...

[PATCH 2/2] BUG/MINOR: http-htx: Just warn if payload of an errorfile doesn't match the C-L

During startup, when an errorfile is parsed, if its payload does not match the
announced content-length, an error is triggered. This change was introduced in
the 2.3, which is ok. But for a stable release it may be seen as a
regression. Thus, now a warning is emitted, instead of an error. And the
content-length header is updated with the real payload length.

This patch depends on 58f55acf4e ("MINOR: http-htx: Add understandable errors
for the errorfiles parsing"). Both must be backported as far as 2.0. This bug
only exists in the 2.2, 2.1 and 2.0. Thus, there is no upstream commit ID for
this patch.

Gbp-Pq: Name 0002-BUG-MINOR-http-htx-Just-warn-if-payload-of-an-errorf.patch