清理 shm 資訊

config.h
#define BRDSHM_KEY 2997
#define UTMPSHM_KEY 1998
#define FILMSHM_KEY 2999

%ipcs
Message Queues:
T ID KEY MODE OWNER GROUP

Shared Memory:
T ID KEY MODE OWNER GROUP
m 65536 1998 --rw------- bbs bbs
m 65537 2997 --rw------- bbs bbs
m 65538 2999 --rw------- bbs bbs

Semaphores:
T ID KEY MODE OWNER GROUP

%ipcrm -M 1998
%ipcrm -M 2997
%ipcrm -M 2999