OpenWRT/LEDE only understands the PKG_MD5SUM variable, and detects if the
hash is e.g. SHA256 by looking at the length of the hash.
This affects libs/libmicrohttpd, mail/ssmtp and utils/mc.
Signed-off-by: Baptiste Jonglez <git@bitsofnetworks.org>
Drop gnutls and use openssl instead, due to excessive memory consumption in embedded environment for an additonal ssl library.
Signed-off-by: Dirk Brenken <dibdot@gmail.com>
