exchange: introduce a wireprotocol command to push markers
Pushkey is not adapted to transmit a stream of binary data. We used it as a hack
so far. We add a new wire protocol command to speed the things up (and also push
all the markers in a single transaction). The proper way to do it is to
introduce bundle2 in core, but this will already help in the mean time.
syntax: re
/figures/[^/]+\.png$
^docs/build/
^docs/html/
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
\.err$
^tests/easy_run.sh$
^build/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$