Compile error rijndael on Solaris 2.6 (and fix)

[Lasse Holmqvist]

When compiling openssh-SNAP-20001014 on Solaris 2.6 with
gcc 2.95.2 I get:

In file included from rijndael.c:42:
rijndael.h:6: parse error before `u1byte'
and a lot more warnings and errors...

Solved by adding 
#include "config.h"
in rijndael.c

Lasse Holmqvist