use unsafe blocks in `sync/`

See merge request redox-os/relibc!505

feat: ignore negative fd and clear its revents in poll(2)

See merge request redox-os/relibc!484

Use unsafe blocks in crypt.h implementation

See merge request redox-os/relibc!503

Use unsafe blocks in assert.h implementation

See merge request redox-os/relibc!502

Use unsafe blocks in arpa/inet.h implementation

See merge request redox-os/relibc!501

Fix the Redox OS test execution command

See merge request redox-os/relibc!500

Test endian.h macros

See merge request redox-os/relibc!499

Fix little-endian-specific endian.h tests

See merge request redox-os/relibc!498

Add `endian.h`

See merge request redox-os/relibc!497

Un-mutexify random() default buffer

See merge request redox-os/relibc!496

Explain what redox-rt is

See merge request redox-os/relibc!495

Put random() state behind mutex

See merge request redox-os/relibc!491

Remove all uses of the legacy scheme syntax

See merge request redox-os/relibc!492

Fixes for forkpty and dprintf tests

See merge request redox-os/relibc!494

The former is more portable, even on Linux if for example sudo/doas is used.

Implement ctermid()

See merge request redox-os/relibc!490

Refactor mktime, timegm and fix wcpncpy test

See merge request redox-os/relibc!487

swscanf and vswscanf implementation proposal

See merge request redox-os/relibc!472

Implement dprintf and vdprintf

See merge request redox-os/relibc!489

Implement getpass()

See merge request redox-os/relibc!488

Use u8 internally instead of `c_char`.