This fixes the URI bug submitted by @enigma0x3. Thank you for the PR as well! A legacy switch is added in case anyone is relying on this script and an older meterpreter handler.
Proxy support is added to grab the default proxy by way of a switch.
The default user-agent is grabbed from the registry instead of being a static string.
I tested this on a Windows 7 SP1 (both x86 and 64-bit) and Windows 8.1 (64-bit) with an older handler and an updated one.
Chris Campbell
mattifestation