Defines starting with `l' in kern

• LFS_VFSOPS kern/vfs_conf.c:69
• LOFS_VFSOPS kern/vfs_conf.c:90
• LOG_ASYNC kern/subr_log.c:50
• LOG_RDPRI kern/subr_log.c:48
• LOG_RDWAIT kern/subr_log.c:51