[ Simon Long ]
  * Function to read hostname added
  * Function added to get wifi country
  * Functions to detect boot behaviour added
  * Test functions added for remote GPIO and slow boot
  * Added some functions to read current state for use by rc_gui
  * Requirement for reboot removed from SPI and I2C settings
  * A lot of NOTs taken out of serial test
  * Status indications moved to end of some functions
  * Overscan description amended
  * Check for fs expandability added; overscan function matches others
  * Added more success / fail feedback to settings
  * Global check for mountpoint and existence of /boot/config.txt
  * Checking of initial state added for camera and 1-wire
  * Unnecessary reboots removed
  * Some function names changed for consistency
  * GL driver setting aligned with other functions
  * Functions to control remote GPIO and boot wait for network aligned
  * Tidied function to control remote GPIO access