broken regression/acct for several years

Hi.

This commit - kern_acct.c,v1,94 / svn r172023 - broke
regression/acct just before 7.0 was out by inclusion
kernel log() function call that requires <sys/syslog.h> include,
and some magic with kernel/userland side of syslog() since
log() on userland side is  not present.

It could be fixed by changing log() with simple printf() and
adding <sys/limits.h> specilally for regression test to

-- m
wbr,
pluknet