$ diff -Naur Implementation+orig Implementation                           
diff -Naur Implementation+orig/HTBufferFile.c Implementation/HTBufferFile.c
--- Implementation+orig/HTBufferFile.c  1991-08-20 14:47:09.000000000 +0100
+++ Implementation/HTBufferFile.c       2009-12-16 12:45:17.000000000 +0000
@@ -123,9 +123,9 @@
 */
 
 #ifdef __STDC__
-PRIVATE int HTBufferRead(void)
+int HTBufferRead(void)
 #else
-PRIVATE int HTBufferRead()
+int HTBufferRead()
 #endif
 
 {
diff -Naur Implementation+orig/HTTCP.c Implementation/HTTCP.c
--- Implementation+orig/HTTCP.c 1991-08-21 11:44:33.000000000 +0100
+++ Implementation/HTTCP.c      2009-12-16 12:41:54.000000000 +0000
@@ -48,8 +48,8 @@
 #ifndef VM
 #ifndef vms
 #ifndef NeXT
-extern char *sys_errlist[];            /* see man perror on cernvax */
-extern int sys_nerr;
+extern __const char *__const sys_errlist[];            /* see man perror on cernvax */
+extern __const int sys_nerr;
 #endif
 #endif
 #endif