Log Message:
Update to 2.4.2:

libgphoto2 2.4.2

This is a 2.4 release branch update.

libgphoto2:
   * Camera abilities list sorting now uses qsort(),
     bringing startup speedups by seconds. (0.4 seconds on 2GHz machine).

   * On large files, do not try to retrieve thumbnails.

   * Updated lots of translations.

PTP2 driver:
   * Full merge of TRUNK ptp2 camlib.

   * Lots of new IDs added. Also changed MTP id handling to share devices
     with current libmtp.
   * Canon now can capture to both CF/SD Card and internal memory
     with extract/retracting the lens. "capturetarget" config option
     determines which ones used.

   * EOS capture support made working with newer Canon EOS models,
     now reported working for EOS 400D, 450D, 40D.

   * Handle MTP -> Canon/Nikon vendor id transitions better.
   * Download cancellation support.
   * Handle canon cameras with shorter timeouts on startup (hopefully
     does not break) to avoid very long second startup delays.

   * Lots of bugfixes.

Canon driver:
   * Configuration of Flash, Beep and Zoom added.
   * Enable/disable remote mode only once per session (on demand)
   * Fixed a CR2 thumbnail download problem.
   * Fixed a THM download problem (for movies).
   * Moved some more cameras over to PTP2 driver.

Topfield driver:
   * New driver for Topfield PVR5000 device(s).

* Sony DSC F1 (old serial) driver:
   * Merged from TRUNK, working now.