openssl: update download mirrors

New releases of openssl are only published on GitHub, and official
downloads are also redirected to GitHub. So remove the old download
mirrors (file 404), and replace the current address with https.

Link: https://openssl-library.org/source/
Signed-off-by: Chukun Pan <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/16470
Signed-off-by: Hauke Mehrtens <[email protected]>

package/libs/openssl/Makefile

@@ -17,13 +17,9 @@ PKG_BUILD_PARALLEL:=1
 PKG_BASE:=$(subst $(space),.,$(wordlist 1,2,$(subst .,$(space),$(PKG_VERSION))))
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:= \
-	http://www.openssl.org/source/ \
-	http://www.openssl.org/source/old/$(PKG_BASE)/ \
-	https://github.com/openssl/openssl/releases/download/$(PKG_NAME)-$(PKG_VERSION)/ \
-	http://ftp.fi.muni.cz/pub/openssl/source/ \
-	http://ftp.fi.muni.cz/pub/openssl/source/old/$(PKG_BASE)/ \
-	ftp://ftp.pca.dfn.de/pub/tools/net/openssl/source/ \
-	ftp://ftp.pca.dfn.de/pub/tools/net/openssl/source/old/$(PKG_BASE)/
+	https://www.openssl.org/source/ \
+	https://www.openssl.org/source/old/$(PKG_BASE)/ \
+	https://github.com/openssl/openssl/releases/download/$(PKG_NAME)-$(PKG_VERSION)/
 
 PKG_HASH:=23c666d0edf20f14249b3d8f0368acaee9ab585b09e1de82107c66e1f3ec9533
 
@@ -74,7 +70,7 @@ endif
 
 define Package/openssl/Default
   TITLE:=Open source SSL toolkit
-  URL:=http://www.openssl.org/
+  URL:=https://www.openssl.org/
   SECTION:=libs
   CATEGORY:=Libraries
 endef