Page alignment is now verified at compile time, for example.

Reduce usage of unstable features

See merge request !230

Fix fmap typo and remove warning.

See merge request !237

Alternative physmap via memory:physical@<mem type>.

See merge request !236

Set space in copy_and_capture_tail.

See merge request !235

abort will still run the illegal instruction interrupt handler which may
not be safe.

Fix debug: scheme.

See merge request !233

Simplify x86_64 percpu and GSBASE calculation

See merge request !222

Avoid static mut thread locals

See merge request !228

Fix live scheme

See merge request !232

Usercopy migration

Closes #82 and #115

See merge request !219

Replace Box<dyn Fn> with fn in sys: scheme.

See merge request !231

Instead use UnsafeCell inside the thread locals.

Build the kernel with panic=abort

See merge request !229

Move IDTR thread local to a stack variable

See merge request !227

This reduces the kernel size and avoids the need to define the
eh_personality lang item.

Improved pipe scheme.

Closes #84

See merge request !226

Always clear DF when entering the kernel

See merge request !223

More aarch64 stuff

See merge request !221