Add missing file /.profile.

Simplify stty utility, remove unused options.

sys/include/ioctl.h

@@ -161,7 +161,6 @@ struct ttysize {
 #define     PASS8       0x08000000
 #define     CTLECH      0x10000000          /* echo control chars as ^X */
 #define     PENDIN      0x20000000          /* tp->t_rawq needs reread */
-#define     DECCTQ      0x40000000          /* only ^Q starts after ^S */
 #define     NOFLSH      0x80000000          /* no output flush on signal */
 /* locals, from 127 down */
 #define TIOCLBIS        _IOW('t', 127, int) /* bis local mode bits */
@@ -181,7 +180,6 @@ struct ttysize {
 #define     LPASS8      ((int)(PASS8>>16))
 #define     LCTLECH     ((int)(CTLECH>>16))
 #define     LPENDIN     ((int)(PENDIN>>16))
-#define     LDECCTQ     ((int)(DECCTQ>>16))
 #define     LNOFLSH     ((int)(NOFLSH>>16))
 #define TIOCSBRK        _IO ('t', 123)      /* set break bit */
 #define TIOCCBRK        _IO ('t', 122)      /* clear break bit */

sys/kernel/tty.c

@@ -1225,13 +1225,6 @@ erasenb:
         }
     }
 endcase:
-    /*
-     * If DEC-style start/stop is enabled don't restart
-     * output until seeing the start character.
-     */
-    if (t_flags & DECCTQ && tp->t_state & TS_TTSTOP &&
-        tp->t_startc != tp->t_stopc)
-        return;
 restartoutput:
     tp->t_state &= ~TS_TTSTOP;
     tp->t_flags &= ~FLUSHO;