Implement support for ssl cert verify toggling

[OJ]

This PR contains the Meterpreter-side of the MSF PR that implements SSL certificate verification toggling. Full details of the concept/etc, along with how to test/validate can be found over there.

The MSF PR is: https://github.com/rapid7/metasploit-framework/pull/5081

Stuff done in this PR

• Implemented get/set command for ssl certificate verification. This obviously only applies to transports that are HTTPS as this point, though later on we might be able to add it for tcp too.
• Updated the transport switching command name/function so that it's in sync with these changes.
• Did some code tidying and refactoring.

  Verification

• [x] Windows payloads still build cleanly.
• [x] Posix payloads still build cleanly.
• [ ] All the stuff in the MSF PR works.

  Sample runs

Please see the MSF PR.

[metasploit-public-bot]

Test PASSED. Refer to this link for build results (access rights to CI server needed): https://ci.metasploit.com//job/GPR-MeterpreterWin/177/ Test PASSED.

[bcook-r7]

Somehow all of the EOL characters changed in source/server/server_setup_win.c between this and master.

[OJ]

Crap :(

[OJ]

I'm not sure what's going on here. The line endings for the file are definitely right now (using the Windows CRLF style like the rest of them), but github thinks that the line endings have all changed.

Totally confused.

[metasploit-public-bot]

Test PASSED. Refer to this link for build results (access rights to CI server needed): https://ci.metasploit.com//job/GPR-MeterpreterWin/181/ Test PASSED.

[kernelsmith]

Git config has a setting for controlling the line sirltuation, maybe that got changed?

[OJ]

It hasn't changed on any of my setups for about 4 years :)

[bcook-r7]

thanks for the update, lets get a gem build going.