lavf/libssh: add MAINTAINERS entry

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/network: fix duplicate include

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec: fix duplicate includes

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>