Add fossil VCS support to cargo new

[ketralnis]

Fossil is a simple, high-reliability, distributed software configuration management system https://www.fossil-scm.org/

I mostly followed #3842 as a template. Like that one, this only adds support for cargo new, not for pulling down fossil-hosted dependencies

A problem that i didn't tackle but I'd be willing to is a little more more traitifying of the VCSs. I would need some guidance on that since it looks like git has some more thorough support than e.g. hg does but it looks pretty doable

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @brson (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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[ketralnis]

There's a CI failure but it looks like it's happening in Windows stuff that I don't think I can have touched?

error: failed to run custom build command for `libz-sys v1.0.13`
process didn't exit successfully: `C:\projects\cargo\target\debug\build\libz-sys-7b5eea371d27baa2\build-script-build` (exit code: 1)
--- stdout
running: "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\bin\\amd64\\nmake.exe" "/nologo" "/f" "C:\\projects\\cargo\\target\\debug\\build\\libz-sys-0598af38eaebd697\\out\\build/win32/Makefile.msc" "zlib.lib"
command did not execute successfully, got: exit code: 2
--- stderr
Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.
NMAKE : fatal error U1065: invalid option '-'
Stop.
Build failed, waiting for other jobs to finish...
error: build failed
Command exited with code 101

[alexcrichton]

@bors: r+

Thanks! That error may bounce this PR but I'll take care of it, no worries!

[bors]

📌 Commit 7eca7f2 has been approved by alexcrichton

[bors]

⌛ Testing commit 7eca7f2 with merge 0279815...

[bors]

💔 Test failed - status-appveyor

[Mark-Simulacrum]

@bors retry

Looks like the spurious failure noted above.

[alexcrichton]

@bors: retry

[bors]

⌛ Testing commit 7eca7f2 with merge faa7668...

[bors]

💔 Test failed - status-travis

[alexcrichton]

@bors: retry

…

On Tue, Jun 13, 2017 at 9:41 PM, bors ***@***.***> wrote: 💔 Test failed - status-travis <https://travis-ci.org/rust-lang/cargo/builds/242578683?utm_source=github_status&utm_medium=notification> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#4155 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAD95PxT4NhO7b_t7VEL6VNUbeLywbKrks5sD0hIgaJpZM4N19k9> .

[bors]

⌛ Testing commit 7eca7f2 with merge e934177...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: alexcrichton
Pushing e934177 to master...

[ketralnis]

Awesome! Thanks all!