REGTEST: Add a simple script to tests errorfile directives in proxy sections

This script is compatible with all HAProxy versions. It does not depend on 2.2
features.

(cherry picked from commit 60837d340ccf0c715b0b06db347d66109c20accf)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 81c76843a0b7732855babbcae99b5b8adccb9b4f)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed