Lighthouse: Native Windows Support

[michaelsproul]

Description

Support compiling Lighthouse with MSVC and executing as a native binary on Windows, without requiring the Windows Subsystem for Linux. Windows support under WSL is covered by #1238

Known Issues

• [x] LevelDB doesn't run on Windows. Soln: RocksDB, LMDB? (#483)
• [ ] We use some unix filesystem operations, particularly around permissions. Soln: separate permissions code for Windows.
• [ ] Probably lots of networking incompatibilities (to investigate)
• [x] milagro_bls uses paths that are not valid on Windows (#1447)

More points to be added as they're discovered

[michaelsproul]

As a temporary workaround for the LevelDB issue, we could use the MemoryStore on Windows, and conditionally compile out all references to LevelDB using a feature flag (https://doc.rust-lang.org/cargo/reference/features.html).

[paulhauner]

I believe @AgeManning is having a look at this, when he has spare time.

[AgeManning]

Yep, conditional on the spare time part. Things keep arising at the moment.

If someone is interested in this, feel free to get a start on this.

[pawanjay176]

Managed to make everything compile (without restricting file permissions) and run a node and validator.

Working on fixing the file permissions atm.

[pawanjay176]

Found a nice library for manipulating windows file access control lists https://github.com/trailofbits/windows-acl