tests: allow optional output when `test-lfs-server` is sent SIGTERM
I guess this has only ever been tested on Windows, but on macOS, the test was
failing with changes like:
+++ /private/tmp/mercurial-ci/tests/test-lfs-test-server.t#git-server.err
@@ -858,6 +858,7 @@
(Restart the server in a different location so it no longer has the content)
$ "$PYTHON" $RUNTESTDIR/killdaemons.py $DAEMON_PIDS
+ $TESTTMP.sh: line 153: 38639 Terminated: 15 lfs-test-server > lfs-server.log 2>&1
#if hg-server
$ cat $TESTTMP/access.log $TESTTMP/errors.log
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}