dev-util/kgtp: add kernel configure sanity check

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
dev-util/kgtp: take advantage of linux-mod eclass

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
dev-util/kgtp: remove no-herd to make repoman happy

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
net-p2p/mldonkey: fix indirect link to libpng problem

see bug #432772, #435430

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>