Add post-exploitation module to get FW filtering rules
Ports default values added, is_internal REX function added, reference added
Do minor cleanup
Merge pull request #6 from jvazquez-r7/review_4187

Do minor cosmetic cleanup for post-exploitation module to get FW filtering rules
session.tunnel_peer changed by session.session_host. Other minor changes
Rex::Socket.to_sockaddr changed
Rex::Socket.to_sockaddr changed
Fix DYNAMIC_BASE templates
Support 32 and 64-bit for exe-only, and fix -k
Document method

Fix #4366 (support dynamic_base templates)
recvfrom allocation changed
Show message at the end
Fix duplicate :ua_maxver key.
Land #4454 - Fix duplicate :ua_maxver key in firefox exploit
Remove stray line comment that ruined things when minified.
Do minor module clean up
Land #4187, @BorjaMerino's post module to get output rules
Fix banner
Land #4457 - Fix firefox in-memory payload execution

Fix #4374
Land #4377, Support DYNAMIC_BASE templates - resolves #4366