add const etc.
bio_entry.c: a bit refactor.
use strlen instead of strnlen.
a bit fix.
a bit refactor.
fix: should check device name length in reading super sector.
needless to check device name length.
fix: check device name length.
use UUID_SIZE and UUID_STR_SIZE.
fix: sizeof("") is 1.
a bit refactor.
fix: is_valid_super_sector().
fix: WALB_DEV_NAME_MAX_LEN.
fix: use memset and snprintf instead strncpy.
fix; do not use DISK_NAME_LEN_USER.
fix: sizeof("") is 1.
Merge branch 'review-work' into develop
refactor: use lsid_set struct inside walb_dev struct.
Merge branch 'review-work' into develop
refactor: name of lsid_set fields.