- include string.h (instead of sys/systm.h) on userland compilation.
make compilation under src/regress/sys/crypto happier. from minoura
- (blowfish) KNF.
- use u_int32_t for 32bit quantity unsigned integer type.
- s/unsigned long/BF_LONG/ (BF_LONG = u_int32_t) where appropriate.
- prototype cleanup - due to *BSD code sharing, we still are using __P().
part of PR 10918. sync with kame.