configure: check for sysctl, since we no longer use sysctlbyname
configure: check for sysctl, since we no longer use sysctlbyname

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb