Revert "trying to get chrome calls working"

This reverts commit 35d5ea7f3c10f9323bface978b0559ae8e8b47e1.
Revert "trying to get chrome calls working"

This reverts commit 7ac114135e10aab74bf09c8313d756e8212ab65e.
Revert "test weird chrome-style rtcp attribute"

This reverts commit cf8a55f3afe84f40b26f5226261ed163c53ceeae.
Revert "leave out rtcp attribute in rtcp-mux case"

This reverts commit c7477e3fa9a8b1b56ae23217f6ea0dda6b634f75.