leaving servername unconfigured creates 404's in master manifest

[flipmcf]

If casterpak is configured without a servername the master playlist is generated with relative url's,
the client will prepend the .csmil path when requesting media manifests.

This leads to 404s when the client requests media manifests:

Note relative links here:
http://example.com/i/20220705/1251/1_p0kdyds9_1_,5421xtpq,d3poh4s7,_1.mp4.csmil/manifest.m3u8

# Media Playlists
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=730785,BANDWIDTH=865938,CODECS="avc1.42C01E,mp4a.40.2",RESOLUTION=854x480
1_p0kdyds9_1_5421xtpq_1.mp4/index_0_av.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=782604,BANDWIDTH=1178958,CODECS="avc1.4D401F,mp4a.40.2",RESOLUTION=854x480
1_p0kdyds9_1_d3poh4s7_1.mp4/index_0_av.m3u8

Then this is requested:

http://example.com/i/20220705/1251/1_p0kdyds9_1_,5421xtpq,d3poh4s7,_1.mp4.csmil/1_p0kdyds9_1_5421xtpq_1.mp4/index_0_av.m3u8

And replies with 404.

[flipmcf]

configure your servernames...