OSVDB and comment doc fixes
Rewrite description for MS13-005

The first part of the description was copy-pasted from

http://packetstormsecurity.com/files/122588/ms13_005_hwnd_broadcast.rb.txt

which contained some grammatical errors. Please try to avoid cribbing
other researchers' descriptions directly for Metasploit modules.
Use consistent caps for 'PowerShell'
Update description for reverse_https_proxy
Msftidy fixes, also use correct possessive plurals

http://englishplus.com/grammar/00000132.htm
Land #2190, @todb-r7's (more than) cosmetic changes