Macros starting with `u' in bsd/netat

• UAL_ASSIGN bsd/netat/appletalk.h:68
• UAL_UAL bsd/netat/appletalk.h:69
• UAL_VALUE bsd/netat/appletalk.h:70
• UAS_ASSIGN bsd/netat/appletalk.h:65
• UAS_UAS bsd/netat/appletalk.h:66
• UAS_VALUE bsd/netat/appletalk.h:67