Add shebang to cron.daily etc files.

debian/changelog

@@ -2,6 +2,7 @@ propellor (2.1.1) UNRELEASED; urgency=medium
 
   * When running shimmed (eg in a docker container),
     improve process name visible in ps.
+  * Add shebang to cron.daily etc files. 
 
  -- Joey Hess <id@joeyh.name>  Mon, 16 Feb 2015 19:00:48 -0400
 

src/Propellor/Property/Cron.hs

@@ -30,7 +30,10 @@ data Times
 job :: Desc -> Times -> UserName -> FilePath -> String -> Property NoInfo
 job desc times user cddir command = combineProperties ("cronned " ++ desc)
 	[ cronjobfile `File.hasContent`
-		[ "# Generated by propellor"
+		[ case times of
+			Times _ -> ""
+			_ -> "#!/bin/sh\nset -e"
+		, "# Generated by propellor"
 		, ""
 		, "SHELL=/bin/sh"
 		, "PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin"