Merge !106: uint: typedef globally but not more than once

Before C11, repeating a typedef is forbidden, if taken strictly, and
some compiler versions even reject it.  On the other hand lru.h was
missing it, which wasn't noticed due to glibc's <sys/types.h> defining it.
Fixes https://gitlab.labs.nic.cz/knot/resolver/issues/114.

contrib/ucw/config.h

@@ -38,7 +38,12 @@ typedef int32_t s32;			/** Exactly 32 bits, signed **/
 typedef uint64_t u64;			/** Exactly 64 bits, unsigned **/
 typedef int64_t s64;			/** Exactly 64 bits, signed **/
 
+
+#ifndef uint /* Redefining typedef is a C11 feature. */
 typedef unsigned int uint;		/** A better pronounceable alias for `unsigned int` **/
+#define uint uint
+#endif
+
 typedef s64 timestamp_t;		/** Milliseconds since an unknown epoch **/
 
 // FIXME: This should be removed soon

lib/defines.h

@@ -36,6 +36,11 @@
 #define KR_COLD
 #endif
 
+#ifndef uint /* Redefining typedef is a C11 feature. */
+typedef unsigned int uint;
+#define uint uint
+#endif
+
 /*
  * Error codes.
  */