12306 XPG4v2 slave pty behaviour should generally be disabled
Reviewed by: Robert Mustacchi <rm@fingolfin.org>
Change-ID: I7ccd399c22866f34dd20c6bb9d28e77ba4e24c67

@@ -286,11 +286,11 @@
 #define STWRERRNONPERSIST 0x00002000    /* nonpersistent write errors */
 #define STRCLOSE        0x00004000      /* wait for a close to complete */
 #define SNDMREAD        0x00008000      /* used for read notification */
 #define OLDNDELAY       0x00010000      /* use old TTY semantics for */
                                         /* NDELAY reads and writes */
-        /*              0x00020000         unused */
+#define STRXPG4TTY      0x00020000      /* Use XPG4 TTY semantics */
         /*              0x00040000         unused */
 #define STRTOSTOP       0x00080000      /* block background writes */
 #define STRCMDWAIT      0x00100000      /* someone is doing an _I_CMD */
         /*              0x00200000         unused */
 #define STRMOUNT        0x00400000      /* stream is mounted */