F_CLOCK changed to F_USB to be more descriptive, and applicable on future architecture ports.

LUFA/ManPages/MigrationInformation.txt

@@ -32,6 +32,8 @@
  *      reconfiguring all Endpoints/Pipes in order each time a new Endpoint/Pipe is created. To minimise the compiled program
  *      size, the new \c ORDERED_EP_CONFIG compile time option may be defined in the project makefile to restrict the ordering
  *      in exchange for a smaller compiled binary size.
+ *    - The previous F_CLOCK symbol, required in the project makefile, has been renamed to F_USB. This is due to the previous name
+ *      being far too generic for use in future architecture ports, where multiple clock domains are used.
  *
  *  <b>Device Mode</b>
  *    - The Endpoint stream functions now all require a \c BytesProcessed parameter instead of the previous callback parameter.
@@ -368,7 +370,7 @@
  *  \section Sec_Migration090401 Migrating from 090209 to 090401
  *
  *  <b>All</b>
- *    - LUFA projects must now give the raw input clock frequency (before any prescaling) as a compile time constant \c F_CLOCK,
+ *    - LUFA projects must now give the raw input clock frequency (before any prescaling) as a compile time constant \c F_USB,
  *      defined in the project makefile and passed to the compiler via the -D switch.
  *    - The makefile EEPROM programming targets for FLIP and dfu-programmer no longer program in the FLASH data in addition to the
  *      EEPROM data into the device. If both are to be programmed, both the EEPROM and FLASH programming targets must be called.