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This gives us more headroom on the scheduler tests to tamp
down some flakes.

refactor modelfile parser

fix line ending

replace CRLF with LF

* Add a /clear command

* change help messages

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Co-authored-by: Patrick Devine <patrick@infrahq.com>

server: destination invalid

types/model: fix name for hostport

Fix/issue 3736: When runners are closing or expiring. Scheduler is getting dirty VRAM size readings.

log when the waiting for the process to stop to help debug when other tasks execute during this wait.
expire timer clear the timer reference because it will not be reused.
close will clean up expireTimer if calling code has not already done this.

fix runner expire during active use.  Clearing the expire timer as it is used.  Allowing the finish to assign an expire timer so that the runner will expire after no use.

Co-authored-by: Blake Mizerany <blake.mizerany@gmail.com>

- return descriptive error messages when unauthorized to create blob or push a model
- display the local public key associated with the request that was denied

Updated the code a bit