Implemented seekability over RTSP.
Implemented seekability over RTSP.

sklnet/DirectFB,mtsekm/test,deniskropp/DirectFB,lancebaiyouview/DirectFB,djbclark/directfb-core-DirectFB,djbclark/directfb-core-DirectFB,djbclark/directfb-core-DirectFB,dfbdok/DirectFB1,kaostao/directfb,kaostao/directfb,kevleyski/DirectFB-1,jcdubois/DirectFB,kevleyski/directfb,kevleyski/DirectFB-1,deniskropp/DirectFB,jcdubois/DirectFB,Distrotech/DirectFB,deniskropp/DirectFB,lancebaiyouview/DirectFB,kevleyski/directfb,kevleyski/directfb,dfbdok/DirectFB1,mtsekm/test,DirectFB/directfb,Distrotech/DirectFB,sklnet/DirectFB,deniskropp/DirectFB,kevleyski/DirectFB-1,kevleyski/directfb,sklnet/DirectFB,sklnet/DirectFB,DirectFB/directfb,kaostao/directfb,DirectFB/directfb,lancebaiyouview/DirectFB,lancebaiyouview/DirectFB,kevleyski/DirectFB-1,dfbdok/DirectFB1,jcdubois/DirectFB,djbclark/directfb-core-DirectFB,Distrotech/DirectFB,mtsekm/test