build: make use of 76 lib/*.h renamed files

76 private header files renamed to use our standard naming scheme.

This change affects 322 files in libcurl's source tree.

lib/curl_rand.c

@@ -20,7 +20,7 @@
  *
  ***************************************************************************/
 
-#include "setup.h"
+#include "curl_setup.h"
 
 #include <curl/curl.h>
 
@@ -31,7 +31,7 @@
 
 #include "curl_memory.h"
 /* The last #include file should be: */
-#include "memdebug.h"
+#include "curl_memdebug.h"
 
 /* Private pseudo-random number seed. Unsigned integer >= 32bit. Threads
    mutual exclusion is not implemented to acess it since we do not require