Fixed mixed content errors when changing cover art, and using https (courtesy of daneren2005)


git-svn-id: svn://svn.code.sf.net/p/subsonic/code/trunk@4065 104adb81-38d2-4886-885e-82898e39ce25
Fixed errors on certain podcast feeds where they were being incorrectly labeled as video files (courtesy of daneren2005)


git-svn-id: svn://svn.code.sf.net/p/subsonic/code/trunk@4066 104adb81-38d2-4886-885e-82898e39ce25