os: implement waitable management. ...

This implements waitable management for Events (and
implements Events). It also refactors PM to use new
Event/Waitable semantics, and also adds STS_ASSERT
as a macro for asserting a boolean expression. The
rest of stratosphere has been refactored to use
STS_ASSERT whenever possible.

mitm: fix long-standing C descriptor issue.

libstrat: namespace hossynch.hpp

tmp-hid-mitm: less aggressively enable controllers ...

This fixes a crash in SSBU and possibly other games.

ams_mitm: add temporary hid mitm on 9.x for compat

ams: initial support for 9.0.0

ams_mitm: fix bis key generation for newer hardware

autobackup: dump bis keys (closes #583).

pm: inform sm of title ids. remove inconsistent mitm association.

strat: go all in on ncm::TitleId

strat: remove sizeof() / sizeof([0])

Fix for libnx commit 4f441a4/latest master at time of writing

Adjust version string based on ReSwitched vote.

Fix argument type for isspace

Fix logic in ldr_ro_manager ...

Fix argument type for isdigit/isxdigit

stratosphere: all in on enum class CommandId

loader: completely rewrite.

stratosphere: prefer static waitable managers

stratosphere: remove trailing whitespace

ams_mitm: refactor for R_TRY

ams_mitm: update write handle persist path

Fix emummc nintendo dir redirection

Merge branch 'master' into emunand_dev

Merge pull request #555 from lioncash/header ...

bpcmitm_main: Add missing header guard

bpcmitm_main: Remove unnecessary includes ...

Quite a few headers are unused in this header, so we can remove them to
make compilation a tiny bit faster.

bpcmitm_main: Add missing header guard ...

Prevents potential inclusion issues.

setsys_settings_items: Less resource churn with combined key/value construction ...

The previous string construction discards two temporary std::string
instances (operator+ returns by value, not by reference), and creates a
std::string that it doesn't need to (the one around key). Instead we can
just append to the end of the initial std::string itself, saving on two
unnecessary created strings.

append() has a const char* overload as well (as does operator+), so we
can just append the key string as is without creating an entire new
string.

setsys_settings_items: Simplify buffer management in LoadConfiguration() ...

We can use a std::string here instead of setting up a scope guard and
manual allocations. We also don't need to care about null-termination,
as c_str() will automatically ensure this is done when passing it into
ini_parse_string().

Merge branch 'master' into emunand_dev

Update for latest libnx