community/ffmpeg: use built-in RTMP support

Fixes #9554

community/ffmpeg/APKBUILD

@@ -4,7 +4,7 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=ffmpeg
 pkgver=3.4.4
-pkgrel=0
+pkgrel=1
 pkgdesc="Complete and free Internet live audio and video broadcasting solution for Linux/Unix"
 url="http://ffmpeg.org/"
 arch="all"
@@ -13,7 +13,7 @@ options="!check" # tests/data/hls-lists.append.m3u8 fails
 subpackages="$pkgname-dev $pkgname-doc $pkgname-libs"
 makedepends="gnutls-dev lame-dev libvorbis-dev xvidcore-dev zlib-dev libvdpau-dev
 	imlib2-dev x264-dev libtheora-dev coreutils bzip2-dev perl-dev libvpx-dev
-	libvpx-dev sdl2-dev libxfixes-dev libva-dev alsa-lib-dev rtmpdump-dev
+	libvpx-dev sdl2-dev libxfixes-dev libva-dev alsa-lib-dev
 	v4l-utils-dev yasm opus-dev x265-dev libass-dev"
 checkdepends="rsync"
 source="https://ffmpeg.org/releases/ffmpeg-$pkgver.tar.xz
@@ -64,7 +64,6 @@ build() {
 		--enable-gpl \
 		--enable-libass \
 		--enable-libmp3lame \
-		--enable-librtmp \
 		--enable-libvorbis \
 		--enable-libvpx \
 		--enable-libxvid \
@@ -79,6 +78,7 @@ build() {
 		--enable-libxcb \
 		--disable-stripping \
 		--disable-static \
+		--disable-librtmp \
 		--enable-vaapi \
 		--enable-vdpau \
 		--enable-libopus \