* radsecproxy.conf-example: Sanitize and verify rewrite examples.

radsecproxy.conf-example

@@ -83,10 +83,15 @@ tls default {
 
 # Configure a rewrite block if you want to add/remove/modify attributes
 # rewrite example {
+#       # Remove NAS-Port.
 #	removeAttribute 5
+#       # Remove vendor attribute 100.
 #	removeVendorAttribute 99:100
-#	addAttribute 4:11
-#       addVendorAttribute 99:100:200
+#       # Called-Station-Id = "123456"
+#	addAttribute 30:123456
+#       # Vendor-99-Attr-101 = 0x0f
+#       addVendorAttribute 99:101:%0f
+#       # Change users @local to @example.com.
 #	modifyAttribute 1:/^(.*)@local$/\1@example.com/
 # }