read(2): Add write cross reference

Add a write cross reference in the SEE ALSO section.

Sponsored by: Netflix

read.2: Use .Fn markup instead of .Xr for read/write calls

Udpate both write / read references from .Xr to .Fn to eliminate
self-reference cross reference.

Reviewed by: imp
Pull Request: https://gi

read.2: Use .Fn markup instead of .Xr for read/write calls

Udpate both write / read references from .Xr to .Fn to eliminate
self-reference cross reference.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1128

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read.2: Describe debug.iosize_max_clamp

same as it is done for write.2.

PR: 276937
Reported by: bugs.freebsd.org@masklinn.net
Sponsored by: The FreeBSD Foundation
MFC after: 1 week

libsys: relocate implementations and manpages

Remove core system call implementations and documentation to lib/libsys
and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>.
Update paths

libsys: relocate implementations and manpages

Remove core system call implementations and documentation to lib/libsys
and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>.
Update paths to allow libc to find them in their new home.

Reviewed by: kib, emaste, imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/908

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