utils: fix help and version processing

src/common/errcode.c

src/common/errcode.h

src/utils/dig/dig_params.c

src/utils/dig/dig_params.h

src/utils/host/host_params.c

src/utils/host/host_params.h

src/utils/nsupdate/nsupdate_params.c

src/utils/nsupdate/nsupdate_params.h