git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 659892c avformat/tls_mbedtls: generate self-signed cert and key when none is provided in listen mode
659892cda6767b1bcfe07933b20aadaef7f63150