Add support for debian 12.

conf/install_openvpn.conf.sample

@@ -93,9 +93,45 @@ KEY_ALTNAMES=""
 # -
 LZO_COMPRESSION="no"
 
+# - DATA_CIPHERS
+# -
 # - Server cryptographic cipher
 # -
-SERVER_CIPHER="AES-256-CBC"
+# - Example:
+# -    DATA_CIPHERS="AES-256-CBC"
+# -    DATA_CIPHERS="AES-256-GCM:AES-128-GCM:AES-256-CBC"
+# -
+# - Defaults to "AES-256-GCM:AES-128-GCM"
+# -
+# - 
+DATA_CIPHERS=""
+
+# - SERVER_CIPHER
+# -
+# - Server additional cryptographic cipher
+# -
+# - Example:
+# -    SERVER_CIPHER="AES-256-CBC"
+# -    SERVER_AES-256-GCM"
+# -
+# - Defaults to "AES-256-CBC" and is added to DATA_CIPHERS if DATA_CIPHERS was leaave empty.
+# -
+# - Note:
+# - if set, also add the cipher to "DATA_CIPHERS"
+# - 
+SERVER_CIPHER=""
+
+# - DATA_CIPHERS_FALLBACK
+# -
+# - Server fallback cryptographic cipher
+# -
+# - Example:
+# -    DATA_CIPHERS_FALLBACK="BF-CBC"
+# -
+# - Defaults to "BF-CBC"
+# -
+# - 
+DATA_CIPHERS_FALLBACK=""
 
 # - OpenVPN Network(s) used for this server.
 # -