Upgrade meek to 0.17
Since #15435 (moved), there's an official way to use stdin closure as a signal to terminate PTs. meek 0.17 uses this new way. Here is the small diff:
https://gitweb.torproject.org/pluggable-transports/meek.git/diff/?id=0.17&id2=0.16
The only reason I'm bugging you with this upgrade is it also requires a torrc change to simplify the command line and remove the --exit-on-stdin-eof option.