Using %{Module-Failure-Message[*]} in rlm_linelog format results in mangled output

[arr2036]

Issue type

• Defect - Unexpected behaviour (obvious or verified by project member).

Defect

How to reproduce the issue

The original issue was discovered when the 404 error output of the rlm_rest module was concatenated using %{Module-Failure-Message[*]} in an attempt to write it to a log file.

The 404 content was the default NGINX 404 error page.

Each line seemed to be significantly truncated in the log output.

[alandekok]

the xlat buffers in v3 are generally fixed-size, i.e. 256 bytes or 1024 bytes. We can increase ehgtir size, but we can't fix the underlying issue.