phabricator related changes:

- don't lint either contrib or crypto: these are both externally written
	  directories
	- add additional linters for spelling (check common typos like teh ->
	  the)
	- chmod linter checks for executible bit on bad files
	- merge-conflict checks for merge conflict tokens then may have been
	  resolved incorrectly
	- filename checks for back characters in filenames
	- json for json syntax correctness

	- remove history.immutable: it is meaningless on subversion, and causes
	  workflow problems when trying to use git.  It it set to 'true' by
	  default with hg

.arcconfig

@@ -1,5 +1,4 @@
 {
 	"project.name": "S",
-	"phabricator.uri" : "https://reviews.freebsd.org/",
-	"history.immutable" : true
+	"phabricator.uri" : "https://reviews.freebsd.org/"
 }

.arclint

@@ -1,9 +1,25 @@
 {
+  "exclude": "(contrib|crypto)",
   "linters": {
     "python": {
       "type": "pep8",
-      "exclude": "(contrib)",
       "include": "(\\.py$)"
+    },
+    "spelling": {
+      "type": "spelling"
+    },
+    "chmod": {
+      "type": "chmod"
+    },
+    "merge-conflict": {
+      "type": "merge-conflict"
+    },
+    "filename": {
+      "type": "filename"
+    },
+    "json": {
+      "type": "json",
+      "include": "(\\.arclint|\\.json$)"
     }
   }
 }