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 <amadeus@jmu.edu.cn>
Link: https://github.com/openwrt/openwrt/pull/16470
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
38bb47c36c