lfs: enable workers by default

With the stall issue seemingly fixed, there's no reason not to use workers.  The
setting is left for now to keep the test output deterministic, and in case other
issues come up.  If none do, this can be converted to a developer setting for
usage with the tests.

Differential Revision: https://phab.mercurial-scm.org/D7963

hgext/lfs/TODO.rst

@@ -38,9 +38,6 b' ruled out) prior to taking off the exper'
 
    * `hg diff` is similar, and probably shouldn't see the pointer file
 
-#. `Fix https multiplexing, and re-enable workers
-   <https://www.mercurial-scm.org/pipermail/mercurial-devel/2018-January/109916.html>`_.
-
 #. Show to-be-applied rules with `hg files -r 'wdir()' 'set:lfs()'`
 
    * `debugignore` can show file + line number, so a dedicated command could be

hgext/lfs/__init__.py

@@ -181,7 +181,7 b' eh.configitem('
     b'experimental', b'lfs.disableusercache', default=False,
 )
 eh.configitem(
-    b'experimental', b'lfs.worker-enable', default=False,
+    b'experimental', b'lfs.worker-enable', default=True,
 )
 
 eh.configitem(

tests/test-lfs-serve-access.t

@@ -17,6 +17,7 b' tell the client to store files elsewhere'
   $ hg init server
   $ hg --config "lfs.usercache=$TESTTMP/servercache" \
   >    --config experimental.lfs.serve=False -R server serve -d \
+  >    --config experimental.lfs.worker-enable=False \
   >    -p $HGPORT --pid-file=hg.pid -A $TESTTMP/access.log -E $TESTTMP/errors.log
   $ cat hg.pid >> $DAEMON_PIDS
 

tests/test-lfs-serve.t

@@ -65,6 +65,7 b' missing processor for flag \'0x2000\'!" if'
   > debugprocessors = $TESTTMP/debugprocessors.py
   > [experimental]
   > lfs.disableusercache = True
+  > lfs.worker-enable = False
   > [lfs]
   > threshold=10
   > [web]

tests/test-lfs-test-server.t

@@ -40,6 +40,8 b''
 #endif
 
   $ cat >> $HGRCPATH <<EOF
+  > [experimental]
+  > lfs.worker-enable = False
   > [extensions]
   > lfs=
   > [lfs]