dup: checked that bandwidthlimit still works with duplicity 0.4.2, reflected

this into the docs/examples/Changelog

ChangeLog

@@ -25,8 +25,8 @@ version 0.9.4 -- unreleased
 	 . Removed over zealous vsnames check
 	 . Does not pretend anymore that duplicity can work without
 	   any passphrase
-	 . More or less support duplicity >=0.4.2 (bandwidthlimit option maybe
-	   does not work with this version, though; work in progress)
+	 . Support duplicity 0.4.2 (with Debian patches applied; upstream's
+	   0.4.3 will integrate them)
 	sys:
 	 . Many more system checks were added, thanks to Petr Klíma
     lib changes

examples/example.dup

@@ -105,7 +105,6 @@ exclude = /home/*/.gnupg
 #keep = yes
 
 # bandwith limit, in kbit/s ; default is 0, i.e. no limit
-# NB: does not work anymore with duplicity >=0.4.2, work in progress to fix this
 #bandwidthlimit = 128
 
 # passed directly to ssh and scp

handlers/dup.helper

@@ -398,7 +398,6 @@ incremental = $dup_incremental
 keep = $dup_keep
 
 # bandwith limit, in kbit/s ; default is 0, i.e. no limit
-# NB: does not work anymore with duplicity >=0.4.2, work in progress to fix this
 #bandwidthlimit = 128
 bandwidthlimit = $dup_bandwidth