alpine seems to have a new home. Only a git repository now. No release tarballs.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

fix Makefile chmod (644)
replace MD5SUM with HASH
add PKG_MIRROR_HASH when PKG_SOURCE_PROTO:=git

(PKG_SOURCE_PROTO:=svn tarballs are not reproducible for now)

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

Signed-off-by: Stefan Weil <sw@weilnetz.de>

Signed-off-by: Alexander Ryzhov <openwrt@ryzhov-al.ru>

New version requires a patch to skip openssl runtime checking when cross-compiling.

Signed-off-by: Antti Seppälä <a.seppala@gmail.com>

Alpine (Alternatively Licenced Program for Internet News and Email) is a
free software console email client developed at the University of Washington.
It is suitable for both the inexperienced email user as well as for
the most demanding power user.

Signed-off-by: Antti Seppälä <a.seppala@gmail.com>