Tidyup of GPP

Add Security Bulletin Reference
ProgramData is symlink to AllUsers anyway
Use NetAPI
Dont try to read 0 structs
Merge in parser
Tidyup parser
Use parser
More legible output
Initial commit of an NTP fuzzer
Fuzz NTP private messages too
Mixin Msf::Auxiliary::Scanner, switch to run_host to fix DNS lookup issues
Correct order of mixins so RHOSTS works properly
When fuzzing mode 6 (control) and 7 (private) messages, print out each version tested since these tend to take a long time
Fuzz mode 7 more correctly.  Cleanup.

Provide empty 188-byte payload for mode 7 messages, otherwise nothing
seems to response.  Provide more useful defaults for versions/modes.
Allow control over what mode 7 stuff is fuzzed.
Support only fuzzing specific mode 6 operations
Fuzz all 255 possible mode 7 request codes
Minor option cleanup
This module was broken due to a hardcoded IP address for google.com
Fix incorrect use of sock.get that can lead to an indefinite timeout

console1:
```
msf> use auxiliary/scanner/http/open_proxy
msf auxiliary(open_proxy) > set RHOSTS 192.168.0.4
msf auxiliary(open_proxy) > set RPORT 8888
msf auxiliary(open_proxy) > run
< the connection never times out >
```

console2:
```
$ nc -vlp 8888
Listening on [0.0.0.0] (family 0, port 8888)
Connection from [192.168.0.4] port 8888 [tcp/*] accepted (family 2, sport 43245)
GET http://209.85.148.147/ HTTP/1.1
Host: 209.85.148.147
Connection: close
User-Agent: user_agent
Accept-Encoding: *
Accept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7
Cache-Control: no
Accept-Language: de,en;q=0.7,en-us;q=0.3
```

After the patch, requests timeout after 10 seconds:
```
msf auxiliary(open_proxy) > run
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
```
Respect RPORT even if additional ports are specified
Fix incorrect use of sock.get() that could lead to indefinite hang
Fix incorrect use of sock.get(), remove rundant return values