Group commit for recovery after disk crash.
See Changelog for changes WRT release 990110.

diff --git a/documentation/how-to-port b/documentation/how-to-port
index 4a89821..812e23d 100644
--- a/documentation/how-to-port
+++ b/documentation/how-to-port
@@ -72,7 +72,7 @@
   #ifdef HAVE_FOO_H
   #include <foo.h>
   #elif defined (HAVE_BAR_H)
-  #include <bat.h>
+  #include <bar.h>
   #endif
 
 If your system doesn't have a corresponding header file even