sendto


unix datagrams on osx have system send buffer limits of 2048 bytes.

this module performs a posix sendto() but first sets socket option SO_SNDBUF, raising the send limit size up to the size of whatever node buffer you pass.

``bash
npm i sendto
node -e "require('sendto')('/tmp/a', Buffer('hello'))"
`

$3

pass a unix datagram socket path and then the buffer, something like:

`js
const sendto = require('sendto')
const str = 'some buffer bigger than this'
sendto('/tmp/mysocketpath', Buffer(str) )
`

special note on sendto(str, Buffer). there are two ways to interrupt or force node process to exit:

* not giving node buffer

* to an addressable sockname on recv side (bind the recv() first before sendto())

#### my ideas on that:

implicit coercion seems to be preferred by JavaScript over type checking, i.e. convert input to a buffer for the user. And where there's no socket address, we should probably back-off and retry to send later. Or emit JavaScript error event about the missing addressable path. Probably overkill to do a JS error, since the native perror()` call already does some descriptive noise about it, though less catchable in JS