DOC: configuration: document library compatibility for pha

Add a Compatibility line to the pha server keyword documentation, following
the format introduced by commit 18003c561 (DOC: configuration: document
library compatibility for TLS keywords).

Document the minimum OpenSSL version and the lack of support in AWS-LC.

diff --git a/doc/configuration.txt b/doc/configuration.txt
index 63d2c0f743d5d90d690d397bb823332813f2dde1..8d68226536d04667d8d47e56900edbe8f654025f 100644 (file)
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -20321,6 +20321,8 @@ pha
 
   This option is disabled by default.
 
+  Compatibility: OpenSSL >= 1.1.1. Not supported with AWS-LC.
+
   See also "no-pha", "crt", "alpn" and "proto".
 
 pool-conn-name <expr>