BUG/MINOR: mux-h1: Fix a UAF in cfg_h1_headers_case_adjust_postparser()

When an error occurs in the post-parser callback which checks configuration
validity of the option outgoing-headers-case-adjust-file, the error message is
freed too early, before being used.

No backport needed. It fixes the github issue #258.

(cherry picked from commit cac5c094d1da360dd78c188b89c0f7fd52569d61)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed