Macros starting with 'c' in ufs

• cbtorpos ufs/fs.h:373
• cgbase ufs/fs.h:338
• cg_blks ufs/fs.h:287
• cg_blksfree ufs/fs.h:295
• cg_blktot ufs/fs.h:283
• cg_chkmagic ufs/fs.h:299
• cgdmin ufs/fs.h:344
• cgimin ufs/fs.h:343
• cg_inosused ufs/fs.h:291
• cgsblock ufs/fs.h:341
• cgstart ufs/fs.h:339
• cgtod ufs/fs.h:342