Adding documentation to INSTALL

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Hugo Landau <hlandau@devever.net>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25297)

diff --git a/INSTALL.md b/INSTALL.md
index cf942ae1721efb41c157013328521ddda156947f..01ad69a17b6d09a93000c1b5c529760cd47e4b87 100644 (file)
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1078,6 +1078,13 @@ Build with support for the integrated tracing api.
 
 See manual pages OSSL_trace_set_channel(3) and OSSL_trace_enabled(3) for details.
 
+### enable-sslkeylog
+
+Build with support for the SSLKEYLOGFILE environment variable
+
+When enabled, setting SSLKEYLOGFILE to a file path records the keys exchanged
+during a TLS handshake for use in analysis tools like wireshark.
+
 ### no-ts
 
 Don't build Time Stamping (TS) Authority support.