Add a errno -> [error code, uv error message] map to the uv binding
so the error message can be assembled in the JS layer.

Backport-PR-URL: #18916
PR-URL: #17338
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Reimplement uv.errname() as internal/util.getSystemErrorName() to
avoid the memory leaks caused by unknown error codes
and avoid calling into C++ for the error names. Also
expose it as a public API for external use.

Backport-PR-URL: #18916
PR-URL: #18186
Refs: http://docs.libuv.org/en/v1.x/errors.html#c.uv_err_name
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

- Allow user to customize why the argument is invalid
- Display the argument with util.inspect so null bytes can be
  displayed properly.

Backport-PR-URL: #18916
PR-URL: #18358
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>

Backport-PR-URL: #18916
PR-URL: #18546
Reviewed-By: James M Snell <jasnell@gmail.com>

This commit moves error creation helpers scattered around
under lib/ into lib/internal/errors.js in the hope of being clearer
about the differences of errors that we throw into the user land.

- Move util._errnoException and util._exceptionWithHostPort
  into internal/errors.js and simplify their logic so it's
  clearer what the properties these helpers create.
- Move the errnoException helper in dns.js to internal/errors.js
  into internal/errors.js and rename it to dnsException. Simplify
  it's logic so it no longer calls errnoException and skips
  the unnecessary argument checks.

Backport-PR-URL: #18916
PR-URL: #18546
Reviewed-By: James M Snell <jasnell@gmail.com>

Add a errno -> [error code, uv error message] map to the uv binding
so the error message can be assembled in the JS layer.

Backport-PR-URL: #18916
PR-URL: #17338
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Reimplement uv.errname() as internal/util.getSystemErrorName() to
avoid the memory leaks caused by unknown error codes
and avoid calling into C++ for the error names. Also
expose it as a public API for external use.

Backport-PR-URL: #18916
PR-URL: #18186
Refs: http://docs.libuv.org/en/v1.x/errors.html#c.uv_err_name
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

- Allow user to customize why the argument is invalid
- Display the argument with util.inspect so null bytes can be
  displayed properly.

Backport-PR-URL: #18916
PR-URL: #18358
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>

Backport-PR-URL: #18916
PR-URL: #18546
Reviewed-By: James M Snell <jasnell@gmail.com>

This commit moves error creation helpers scattered around
under lib/ into lib/internal/errors.js in the hope of being clearer
about the differences of errors that we throw into the user land.

- Move util._errnoException and util._exceptionWithHostPort
  into internal/errors.js and simplify their logic so it's
  clearer what the properties these helpers create.
- Move the errnoException helper in dns.js to internal/errors.js
  into internal/errors.js and rename it to dnsException. Simplify
  it's logic so it no longer calls errnoException and skips
  the unnecessary argument checks.

Backport-PR-URL: #18916
PR-URL: #18546
Reviewed-By: James M Snell <jasnell@gmail.com>