Miscelaneous docs updates and fixes. (#1249)

Update references to things in CraneStation which have moved, WASI documentation
which has moved to the WASI repo, and fix a few typos.

Author: sunfishcode

crates/lightbeam/README.md

@@ -162,7 +162,7 @@ Lightbeam passes 100% of the specification test suite, but that doesn't necessar
 
 ## Getting involved
 
-You can file issues in the [Wasmtime issue tracker][Wasmtime issue tracker]. If you want to get involved jump into the [CraneStation Gitter room][cranestation-gitter] and someone can direct you to the right place. I wish I could say "the most useful thing you can do is play with it and open issues where you find problems" but until it passes the spec suite that won't be very helpful.
+You can file issues in the [Wasmtime issue tracker][Wasmtime issue tracker]. If you want to get involved jump into the [Bytecode Alliance Zulip][bytecodealliance-zulip] and someone can direct you to the right place. I wish I could say "the most useful thing you can do is play with it and open issues where you find problems" but until it passes the spec suite that won't be very helpful.
 
-[cranestation-gitter]: https://gitter.im/CraneStation/Lobby
+[bytecodealliance-zulip]: https://bytecodealliance.zulipchat.com/
 [Wasmtime issue tracker]: https://github.com/bytecodealliance/wasmtime/issues

crates/wasi-common/README.md

@@ -42,7 +42,7 @@ We expect these to be implemented when network access is standardised.
 We also currently do not support the `proc_raise` hostcall, as it is expected to
 be dropped entirely from WASI.
 
-[WASI API]: https://github.com/bytecodealliance/wasmtime/blob/master/docs/WASI-api.md
+[WASI API]: https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/docs.md
 
 ### Windows
 In our Windows implementation, we currently support the minimal subset of [WASI API]

crates/wasi-common/src/old/snapshot_0/sys/unix/hostcalls_impl/mod.rs

@@ -1,5 +1,5 @@
 //! Unix-specific hostcalls that implement
-//! [WASI](https://github.com/bytecodealliance/wasmtime-wasi/blob/wasi/docs/WASI-overview.md).
+//! [WASI](https://github.com/WebAssembly/WASI).
 mod fs;
 pub(crate) mod fs_helpers;
 mod misc;

crates/wasi-common/src/old/snapshot_0/sys/windows/hostcalls_impl/mod.rs

@@ -1,5 +1,5 @@
 //! Windows-specific hostcalls that implement
-//! [WASI](https://github.com/bytecodealliance/wasmtime-wasi/blob/wasi/docs/WASI-overview.md).
+//! [WASI](https://github.com/WebAssembly/WASI).
 mod fs;
 pub(crate) mod fs_helpers;
 mod misc;

crates/wasi-common/src/sys/unix/hostcalls_impl/mod.rs

@@ -1,5 +1,5 @@
 //! Unix-specific hostcalls that implement
-//! [WASI](https://github.com/bytecodealliance/wasmtime-wasi/blob/wasi/docs/WASI-overview.md).
+//! [WASI](https://github.com/WebAssembly/WASI).
 mod fs;
 pub(crate) mod fs_helpers;
 mod misc;

crates/wasi-common/src/sys/windows/hostcalls_impl/mod.rs

@@ -1,5 +1,5 @@
 //! Windows-specific hostcalls that implement
-//! [WASI](https://github.com/bytecodealliance/wasmtime-wasi/blob/wasi/docs/WASI-overview.md).
+//! [WASI](https://github.com/WebAssembly/WASI).
 mod fs;
 pub(crate) mod fs_helpers;
 mod misc;