util::unique_lock, update loader to new sf semantics

string_view: remove now unecessary comment

ncm: update for new sf semantics

util::string_view, update pgl for new sf semantics

pm: update for new sf semantics

erpt: update for new sf semantics

ro: reduce memory usage by excising (unused) std::malloc

ro: update for new sf semantics

sm, spl: update to use new sf semantics

libstrat: convert to experimental new (super-accurate) sf allocation semantics

docs: vaguely update roadmap

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "6c11c07e"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "6c11c07e"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

ams: bump version to 0.17.1

docs: changelog for 0.17.1

stratosphere: discard unnecessary .eh_frame segment

os: fix missing logic in SdkReplyAndReceive

os: implement 11.x SdkReplyAndReceive

fs: fix keyslotcache unique_lock usage

strat: avoid using unique_lock in a few places

util: fix header dependence

ams: use util::SNPrintf over std:: (size/linker improvements)

spl: reduce heap size

sf: alter serialization to re-use as much logic as possible

ams: save 0x11000 of memory in spl via minor tweaks

util: faster constexpr offsetof calc, at the cost of standards compliance

kern: discard std::__cmpexch_failure_order(std::memory_order)

kern: further codegen tweaks

kern: greatly improve codegen for atomics, scheduler

Do not blank Rsa2048DeviceCertificate or Rsa2048Device as it prevents HOS from booting on newer PRODINFO versions.

kern: fix svc bounds checking for main memory size 4GB -> 8GB (closes #1320)