fixed bugs in converting m3u8 to mpd: handle https URL, always parse subplaylist (cf #290)
fixed bugs in converting m3u8 to mpd: handle https URL, always parse subplaylist (cf #290)

ARSekkat/gpac,aymanelyaagoubi/gpac,rbouqueau/gpac_brew_travis,porcelijn/gpac,porcelijn/gpac,emmanouil/gpac,RodolpheFouquet/gpac,vladimir-kazakov/gpac,rbouqueau/gpac_brew_travis,nguyen-viet-thanh-trung/gpac,rbouqueau/gpac,rbouqueau/gpac,ARSekkat/gpac,rbouqueau/gpac,nguyen-viet-thanh-trung/gpac,vladimir-kazakov/gpac,ARSekkat/gpac,Bevara/Access-open,rauf/gpac,aymanelyaagoubi/gpac,nguyen-viet-thanh-trung/gpac,rauf/gpac,gpac/gpac,rauf/gpac,gpac/gpac,Bevara/Access-open,aymanelyaagoubi/gpac,rauf/gpac,Bevara/Access-open,rbouqueau/gpac,rbouqueau/gpac_brew_travis,RodolpheFouquet/gpac,rbouqueau/gpac,gpac/gpac,nguyen-viet-thanh-trung/gpac,rauf/gpac,vladimir-kazakov/gpac,aymanelyaagoubi/gpac,aymanelyaagoubi/gpac,gpac/gpac,emmanouil/gpac,rbouqueau/gpac_brew_travis,ARSekkat/gpac,porcelijn/gpac,rbouqueau/gpac_brew_travis,gpac/gpac,emmanouil/gpac,RodolpheFouquet/gpac,emmanouil/gpac,nguyen-viet-thanh-trung/gpac,ARSekkat/gpac,porcelijn/gpac,emmanouil/gpac,vladimir-kazakov/gpac,porcelijn/gpac,rauf/gpac,rbouqueau/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,gpac/gpac,vladimir-kazakov/gpac,Bevara/Access-open,gpac/gpac,rbouqueau/gpac_brew_travis,RodolpheFouquet/gpac,RodolpheFouquet/gpac,gpac/gpac,porcelijn/gpac,ARSekkat/gpac,Bevara/Access-open,vladimir-kazakov/gpac,aymanelyaagoubi/gpac,emmanouil/gpac,rbouqueau/gpac,Bevara/Access-open,nguyen-viet-thanh-trung/gpac