Fix vector terminology in the manual.

fixes #17148
dave hates jokes :wink:
hello_world.rs -> main.rs
Remove much of the modules section.

This part can get _really_ confusing, and we want to make sure that
people succeed in the guide. I plan on making a module guide in the
future to replace the information here.
remove rich hickey love
don't say 'semantic'
Disable ASLR on Windows, for now.
Escape backslashes in debugger scripts.
Use DWARF4 on Windows.
auto merge of #16866 : P1start/rust/tuple-indexing, r=brson

This allows code to access the fields of tuples and tuple structs behind the feature gate `tuple_indexing`:

```rust
#![feature(tuple_indexing)]

let x = (1i, 2i);
assert_eq!(x.1, 2);

struct Point(int, int);
let origin = Point(0, 0);
assert_eq!(origin.0, 0);
assert_eq!(origin.1, 0);
```

Implements [RFC 53](https://github.com/rust-lang/rfcs/blob/master/active/0053-tuple-accessors.md). Closes #16950.
Fix #17156
Register snapshots
auto merge of #17142 : sfackler/rust/issue-17115, r=alexcrichton

Closes #17115
Remove BasicMacroExpander and BasicIdentMacroExpander

The spans inside of these types were always None and never used. Pass
the expander function directly instead of wrapping it in one of these
types.

[breaking-change]
Remove dependency on GCC's LTO linker plugin, since Rust does its' own LTO.
auto merge of #17110 : thestinger/rust/dst, r=cmr

The pointer in the slice must not be null, because enum representations
make that assumption. The `exchange_malloc` function returns a non-null
sentinel for the zero size case, and it must not be passed to the
`exchange_free` lang item.

Since the length is always equal to the true capacity, a branch on the
length is enough for most types. Slices of zero size types are
statically special cased to never attempt deallocation. This is the same
implementation as `Vec<T>`.

Closes #14395
auto merge of #17139 : brson/rust/lualatex, r=alexcrichton

Bugs in pdflatex (#12804) are preventing the guide from landing (https://github.com/rust-lang/rust/pull/16657). This solves the immediate problem by changing the build system to prefer lualatex, xelatex to pdflatex (which is apparently obsolete). Because the xelatex on the snapshot bot seems to completely ignore the `-output-directory` option, I also had to frob the makefiles a bit for that case.
auto merge of #17157 : nikomatsakis/rust/occurs-check, r=pcwalton

Avoid ever constructing cyclic types in the first place, rather than detecting them in resolve. This simplifies logic elsewhere in the compiler, in particular on the trait reform branch.

r? @pnkfelix or @pcwalton 

cc #5527
auto merge of #17153 : steveklabnik/rust/add_link_to_manual, r=sfackler

whoops

Fixes https://github.com/rust-lang/rust/pull/16827#issuecomment-55160273
Append target-specific tools directory ($(RUST)/bin/rustlib/<triple>/bin/) to PATH during linking,
so that rustc can invoke them.