hls: libs: add https/ssl support with signed certificate to HLS element
if a self signed certificate is used, the HLS element can download the hls playlist(M3U8) over https but the individual segments (e.g. TS) cannot be loaded.
This is because the uridownloader and adaptivedemux are always set to ssl_strict=true. This patch allows to change this.
Edited by Tim-Philipp Müller