Add docs for wctype.h, fix unsafe handling

See merge request redox-os/relibc!541

Add docs for sys/timeb.h, require unsafe blocks

See merge request redox-os/relibc!540

Add utime.h docs, use unsafe blocks

See merge request redox-os/relibc!538

Add ctype.h docs

See merge request redox-os/relibc!539

Add docs to rand48 functions

See merge request redox-os/relibc!537

Make endian.h functions pub, add docs

See merge request redox-os/relibc!536

Add docs, deny unsafe op in unsafe fn for errno

See merge request redox-os/relibc!534

Add various basic docstrings

See merge request redox-os/relibc!533

fix(stdio): `perror` should be allowed to take NULL prefixes as per spec

See merge request redox-os/relibc!530

fix(netdb): Out of bounds in gethostbyaddr and less transmutes

See merge request redox-os/relibc!535

Implement FusedIterator for NulTerminated, NulTerminatedInclusive

See merge request redox-os/relibc!532

Add C code necessary for libuv to work

See merge request redox-os/relibc!529

Add NulTerminatedInclusive iterator, rewrite/fix strchr/wcschr

See merge request redox-os/relibc!531

Use unsafe blocks in poll.h implementation

See merge request redox-os/relibc!526

Use unsafe blocks in strings.h implementation

See merge request redox-os/relibc!525

Refactor strcasecmp, strncasecmp with iterators

See merge request redox-os/relibc!524

Initial RISC-V64 support

See merge request redox-os/relibc!523