Document various undocumented modules

Signed-off-by: Drew DeVault <drew@ddevault.org>

hare::parse: export parsing utilities

This makes it easier for third-parties to work with annotations. There
might be more room to expand these utilities later, but exporting these
three is a good start.

hare::lex: add registration for user annotations

Signed-off-by: Drew DeVault <sir@cmpwn.com>

hare::lex: scan & discard annotations

Signed-off-by: Drew DeVault <sir@cmpwn.com>

sort: add sort::inplace

Signed-off-by: Drew DeVault <drew@ddevault.org>

regex: nomem updates

Breaking-Change: regex::
Signed-off-by: Armin Preiml <apreiml@strohwolke.at>

test: sort tests by name

Makes it easier to find a test of interest while scanning the output of
a large test series.

Signed-off-by: Drew DeVault <drew@ddevault.org>

bufio::scanner: address my own feedback

Signed-off-by: Lorenz (xha) <me@xha.li>

io+linux: fix rt::dup3 flags

Signed-off-by: Drew DeVault <drew@ddevault.org>

hare::lex: add save, restore functions

Signed-off-by: Drew DeVault <drew@ddevault.org>

bufio::scanner: implement io::seek

Signed-off-by: Drew DeVault <drew@ddevault.org>

io::dup, io::dup2: make flags optional

Signed-off-by: Drew DeVault <drew@ddevault.org>

debug: print context on assertion failure

Signed-off-by: Drew DeVault <drew@ddevault.org>

rt::strcmp: O(1) if data pointers are equal

Signed-off-by: Drew DeVault <drew@ddevault.org>

io::copier: accept io::handle for "from"

Breaking-change: io::copier
Signed-off-by: Drew DeVault <drew@ddevault.org>

strings::dup: update comment for nomem changes

Signed-off-by: Amelia Clarke <selene@perilune.dev>

net::dial::dial_uri: don't return nomem

Signed-off-by: Drew DeVault <drew@ddevault.org>

net::dns: do not abort on fetch tcp errors

Signed-off-by: Armin Preiml <apreiml@strohwolke.at>

net: nomem updates

Breaking-Change: net::
Signed-off-by: Armin Preiml <apreiml@strohwolke.at>

hare::lex: add io::off to location

Signed-off-by: Drew DeVault <drew@ddevault.org>