Patches UA and PROXY in metsrv when running migrate
msftidy'd
De-committing based on suggestions from Meatballs1 and jlee-r7.
Provides methods to patch metsrv stagers with options.
Cleaned up indents.
Refactored expiration and timeout logic in client_core.rb
Mitigates excessive use of lookup operator (hopefully adds clarity)
Uses a hash for options as opposed to numerous methods on blob
Fix typo that caused encoding to ignore saved regs
Rename to more intention-revealing name
Fix baffling comment

See 9d759146
Adding db.add_host() and workspace

- Adding add_host() Although Report host exists, this is a
straightforward method to metasploit-credential::creation::add_host()
- Add workspace.id to the responses of db.current_workspace and
db.workspace and  db.get_workspace
Removing add_host since it is not necessary :(

- Ups I did not needed this. I can get away with report_host and
report_client.
Add post-exploitation module to get FW filtering rules
Ports default values added, is_internal REX function added, reference added
work on linux/armle/shell_reverse_tcp

shorten the execve code, remove exit, grow argv[0] space
add source for linux/armle/shell_reverse_tcp
add source for linux/armle/shell_bind_tcp
work on linux/armle/shell_bind/tcp

same changes as to shell_reverse_tcp
add source for linux/armle/shell_bind_tcp