example/x11: Set raw terminal mode manually instead of with cfmakeraw()

OpenSolaris has no cfmakeraw() so to make the example more portable
we simply do the equivalent operations on struct termios ourselves.

Thanks to Tom Weber for reporting this problem, and finding a solution.

example/x11.c

@@ -79,7 +79,12 @@ static int _raw_mode(void)
     rc = tcgetattr(fileno(stdin), &tio);
     if (rc != -1) {
         _saved_tio = tio;
-        cfmakeraw(&tio);
+        /* do the equivalent of cfmakeraw() manually, to build on Solaris */
+        tio.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+        tio.c_oflag &= ~OPOST;
+        tio.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+        tio.c_cflag &= ~(CSIZE|PARENB);
+        tio.c_cflag |= CS8;
         rc = tcsetattr(fileno(stdin), TCSADRAIN, &tio);
     }
     return rc;