Add backward compatiblity code for <termio.h>.

The backward compatibility code for <termio.h> has been removed starting
from GLIBC 2.42. So it starts to fail on some bleeding edge distributions
like openSUSE Tumbleweed. We took back the code removed from the GLIBC
and put it back inside txInput.c.

textio/txInput.c

@@ -30,6 +30,29 @@ static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/
 #include <unistd.h>
 #include <ctype.h>
 #include <dirent.h>
+#ifdef __GLIBC__
+#  if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 42)
+
+/* Code borrowed from the GLIBC 2.41 */
+#    include <termios.h>
+#    include <sys/ioctl.h>
+
+/* From unix/sysv/linux/bits/ioctl-types.h */
+#define NCC 8
+struct termio
+  {
+    unsigned short int c_iflag;        /* input mode flags */
+    unsigned short int c_oflag;        /* output mode flags */
+    unsigned short int c_cflag;        /* control mode flags */
+    unsigned short int c_lflag;        /* local mode flags */
+    unsigned char c_line;              /* line discipline */
+    unsigned char c_cc[NCC];           /* control characters */
+};
+
+#  else
+#    include <termio.h>
+#  endif
+#endif
 
 
 #include "utils/magsgtty.h"