* include/cygwin/version.h: Bump API minor number for below export.

* cygwin.din (pututline): New exported function.
* syscalls.cc (login): Use pututiline().
(setutent): Open utmp as read/write.
(endutent): Check if utmp file is open.
(utmpname): call endutent() to close current utmp file.
(getutid): Enable all cases, use strncmp() to compare ut_id fields.
(pututline): New.
* tty.cc (create_tty_master): Set ut_pid to current pid.
* fhandler.h (fhandler_serial::vmin_): Declare as size_t.
* fhandler_serial.cc (fhandler_serial::raw_read): Use correct type for
minchars.
(fhandler_serial::ioctl): Set errno if the ClearCommError fails.
(fhandler_serial::tcsetattr): Use correct value for vmin_.
(fhandler_serial::tcgetattr): Ditto.
* fhandler_socket.cc (fhandler_socket::recvmsg): Call if from == NULL
WSARecvFrom with fromlen = NULL.

winsup/cygwin/tty.cc

@@ -88,6 +88,7 @@ create_tty_master (int ttynum)
       cygwin_gethostname (our_utmp.ut_host, sizeof (our_utmp.ut_host));
       __small_sprintf (our_utmp.ut_line, "tty%d", ttynum);
       our_utmp.ut_type = USER_PROCESS;
+      our_utmp.ut_pid = myself->pid;
       myself->ctty = ttynum;
       login (&our_utmp);
     }