Visit type parameter in lifetime suggestion

Previously, Rebuilder did not visit type parameters when rebuilding
generics and path, so in some cases the suggestion turns out to be
erroneous.
Avoid injecting unfulfilled dependence in compiletest on libnative.
Two fixes to get `make check-stage1` working.

1. Fix a long-standing typo in the makefile: the relevant
   CTEST_NAME here is `rpass-full` (with a dash), not
   `rpass_full`.

2. The rpass-full tests depend on the complete set of target
   libraries.  Therefore, the rpass-full tests need to use
   the dependencies held in the CSREQ-prefixed variable, not
   the TLIBRUSTC_DEFAULT-prefixed variable.
After a hash mismatch error, emit file-system paths of crates involved.

Fix #13266.

There is a little bit of acrobatics in the definition of `crate_paths`
to avoid calling `clone()` on the dylib/rlib unless we actually are
going to need them.

The other oddity is that I have replaced the `root_ident: Option<&str>`
parameter with a `root: &Option<CratePaths>`, which may surprise one
who was expecting to see something like: `root: Option<&CratePaths>`.
I went with the approach here because I could not come up with code for
the alternative that was acceptable to the borrow checker.
Removed references to managed boxes/pointers from the tutorial text. Code
examples in relevant sections were similarly altered.
Removed all references to managed closures.
std: Document builtin syntax extensions

These syntax extensions need a place to be documented, and this starts passing a
`--cfg dox` parameter to `rustdoc` when building and testing documentation in
order to document macros so that they have no effect on the compiled crate, but
only documentation.

Closes #5605
Add fetch_and, fetch_or, fetch_xor to AtomicInt, AtomicUint
stop asking LLVM to null-terminate strings

This was missed when dropping the null-termination from our string
types. An explicit null byte can still be placed anywhere in a string if
desired, but there's no reason to stick one at the end of every string
constant.
std: Remove `RefCell::get()`

It's surprising that `RefCell::get()` is implicitly doing a clone
on a value. This patch removes it and replaces all users with
either `.borrow()` when we can autoderef, or `.borrow().clone()`
when we cannot.
std: Remove `RefCell::set()`
test: avoid infinite loop in out-of-stack.rs

This fixes #13238. It avoids an infinite loop when compiling
the tests with `-g`. Without this change, the debuginfo on
`black_box` prevents the method from being inlined, which
allows llvm to convert `silent_recurse` into a tail-call. This
then loops forever instead of consuming all the stack like it
is supposed to. This patch forces inlining `black_box`, which
triggers the right error.
manual: update the note about reserved attributes
manual: many fixes

Mostly around attributes and language items.
etc: attempts at fixing editor highlighting for new attribute syntax
auto merge of #12964 : gereeter/rust/extended-atomics, r=alexcrichton

Fixes #12949.
rustdoc: Fix reporting of ignored tests

librustdoc: instead of skipping ignored tests, pass them to libtest
so it can report them as such.  If a test is marked as `notrust`,
however, it will not show up in the final report.
manual: update style
manual: fix attribute ebnf
manual: further attribute clarifications

- Sort attributes lexicographically
- Use new attribute syntax consistently
- Fix wording describing new attribute syntax
- Expand section on `repr`