Described ssl_cipher_list option.

docs/UserManual.md

@@ -410,6 +410,10 @@ Loads default trusted certificates locations set at openssl compile time.
 ### ssl_forward_secrecy `yes`
 Enable [forward secrecy](https://en.wikipedia.org/wiki/Forward_secrecy).
 
+### ssl_cipher_list
+List of ciphers, specified in OpenSSL format, to present to the client.
+See [this entry](https://www.openssl.org/docs/manmaster/apps/ciphers.html) in OpenSSL documentation for details.
+
 # Lua Scripts and Lua Server Pages
 Pre-built Windows and Mac civetweb binaries have built-in Lua scripting
 support as well as support for Lua Server Pages.