Implemented support for binary prefix/suffix.

data/profile.toml

@@ -49,7 +49,13 @@ suffix = ".######################################-####"
 # encoding = [
 #     { type = "rot", key = 5 },
 #     { type = "base64" }
-# ]
+# ] 
+
+# Example: Binary prefix (PDF header)
+# placement = { type = "body" }
+# encoding = { type = "xor", key = 100 }
+# prefix = [0x25, 0x50, 0x44, 0x46]  
+# suffix = [0x25, 0x25, 0x45, 0x4F, 0x46] 
 
 # Defines arbitrary URI parameters that are added to the request
 [http-get.agent.parameters]