package/libopenssl: drop useless option for rc5

Commit a83d41867c8d (package/libopenssl: add option to enable some
features) added an option to enable rc5. However, since commit
1fff94121936 (Fixup non-x86 openssl build), dated 2002-12-30, rc5
has always been forcibly disabled in Buildroot.

Given that it was unconditionally disabled all this time, and no
one complained, it means there is virtually no-one using rc5, so we
can just drop the option.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: "GAUTRON, Erwan" <erwan.gautron@bertin.fr>
Cc: "Weber, Matthew L Collins" <Matthew.Weber@collins.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit d7178dd432e4905cf96383e5aa316553cf30f178)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

Config.in.legacy

@@ -146,6 +146,13 @@ endif
 
 comment "Legacy options removed in 2022.08"
 
+config BR2_PACKAGE_LIBOPENSSL_ENABLE_RC5
+	bool "libopenssl rc5 was never enabled"
+	select BR2_LEGACY
+	help
+	  The libopenssl option for rc5 never actually enabled rc5,
+	  which had always been disabled in Buildroot.
+
 config BR2_ECLIPSE_REGISTER
 	bool "Eclipse integration removed"
 	select BR2_LEGACY

package/libopenssl/Config.in

@@ -44,10 +44,6 @@ config BR2_PACKAGE_LIBOPENSSL_ENABLE_CHACHA
 	bool "enable CHACHA"
 	default y
 
-config BR2_PACKAGE_LIBOPENSSL_ENABLE_RC5
-	bool "enable RC5"
-	default y
-
 config BR2_PACKAGE_LIBOPENSSL_ENABLE_RC2
 	bool "enable RC2"
 	default y

package/libopenssl/libopenssl.mk

@@ -85,7 +85,6 @@ define LIBOPENSSL_CONFIGURE_CMDS
 			no-fuzz-afl \
 			no-afalgeng \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_CHACHA),,no-chacha) \
-			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_RC5),,no-rc5) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_RC2),,no-rc2) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_RC4),,no-rc4) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_MD2),,no-md2) \