Code cleanup and indentation.

C source files (with the exception of third-party files, i.e. getopt and
md5) have been indented with GNU indent.

The indentation "standard" has been documented in the readme file.

src/info.h

@@ -18,7 +18,7 @@
 */
 
 #ifndef INFO_H
-#define INFO_H
+#  define INFO_H
 
 void print_wrap (char *str, int len, int *n);
 void version (void);