Fixes/host and trim

[tarkah]

This PR makes 2 changes:

1. Uses the new --host and host flags for lazystream to better setup a host override. The variable hostOverride, if set, will update the host used by lazystream and the hosts file update in the docker container. This provides a more robust implementation over feat: make lazy stream host name configurable #72
2. Make trim_xmltv default to no. I don't think having it as a default is good practice, as it's a breaking change and I don't believe reliable at all w/ xTeVe.

[taylorbourne]

💯
I think the trim works in my setup because of the way I generate/merge m3u playlists, so I'm on board with whatever works better across the board. Part of the reason I jammed the hostname change in was because I wasn't sure how I felt about the actual host living in the repo. But I guess.. it ain't my server.

Thanks again dude