arc: Make the history immutable

cryptomilk · cryptomilk · commit b9b89ef7c6bd · 2017-08-18T08:00:42.000+02:00
Under an immutable history the history will not be rewritten.

Signed-off-by: Andreas Schneider &lt;asn@cryptomilk.org&gt;
diff --git a/.arcconfig b/.arcconfig
@@ -1,3 +1,4 @@
 {
   "phabricator.uri" : "https://bugs.libssh.org/"
+  "history.immutable": true
 }

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
`1`	`1`	`{`
`2`	`2`	`"phabricator.uri" : "https://bugs.libssh.org/"`
	`3`	`+ "history.immutable": true`
`3`	`4`	`}`