Defines starting with `u' in quakeworld

• U_ANGLE1 quakeworld/client/protocol.h:193
• U_ANGLE2 quakeworld/client/protocol.h:187
• U_ANGLE3 quakeworld/client/protocol.h:194
• U_COLORMAP quakeworld/client/protocol.h:196
• U_EFFECTS quakeworld/client/protocol.h:198
• U_FRAME quakeworld/client/protocol.h:188
• U_MODEL quakeworld/client/protocol.h:195
• U_MOREBITS quakeworld/client/protocol.h:190
• UNALIGNED_OK quakeworld/client/bothdefs.h:39
• U_ORIGIN1 quakeworld/client/protocol.h:184
• U_ORIGIN2 quakeworld/client/protocol.h:185
• U_ORIGIN3 quakeworld/client/protocol.h:186
• UPDATE_BACKUP quakeworld/client/protocol.h:246
• UPDATE_MASK quakeworld/client/protocol.h:248
• U_REMOVE quakeworld/client/protocol.h:189
• U_SKIN quakeworld/client/protocol.h:197
• U_SOLID quakeworld/client/protocol.h:199