/* Read a hunk of data from FD, up until a terminator. The terminator
is whatever the TERMINATOR function determines it to be; for
example, it can be a line of data, or the head of an HTTP response.
/* Read a hunk of data from FD, up until a terminator. The terminator
is whatever the TERMINATOR function determines it to be; for
example, it can be a line of data, or the head of an HTTP response.