send.2: document ENOTCONN for sendto w/SOCK_STREAM

[knan-rfo_modirum.com]

Summary

sendto on an unconnected sock_stream unix socket can return ENOTCONN, which is not documented in the man page until now. Change that.

[markj]

lib/libc/sys/send.2

79

Sentences should start with a capital letter.

80

Should be .Er ENOTCONN

82

This sentence contradicts the previous one, which says that these functions can be used at any time.

208

Usually we'd use the text from POSIX, in this case "The socket is connection-mode but is not connected."

The text about implied open should be moved up to the paragraph that you're modifying above.

[knan-rfo_modirum.com]

Updated according to review comments. ENOTCONN description aligned with POSIX. Self-contradiction rewritten.

[markj]

lib/libc/sys/send.2

73

Extra blank line.

84

We should further qualify that if the socket is connected, the destination address passed by sendto() and sendmsg() is ignored.

Let's just add .Xr connect 2 to the "SEE ALSO" section below, trying to avoid parentheticals.

[knan-rfo_modirum.com]

Clarified that destination address is ignored if socket is already connected, and clarified where the destination address is sent in the sendmsg call. Formatting.

[markj]

Thanks, this looks ok to me.