Merge branch 't/sound_device_lock'

Cooking since 2014-09-22.

* t/sound_device_lock:
  oss: Avoid sound artefacts on some setups.
  oss: Introduce sound device lock.
  audiod: Invalidate current audio format on close.

diff --cc NEWS
index 305d9147b2f0be1a3f02697be4a769fed2024449,f7158c455fc90723d11ad6902b4e2042d6b93955..82e0f0d5b495b1eb4badfd19407cb30a5d35a18b
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -5,12 -5,9 +5,13 @@@ NEW
  0.5.4 (to be announced) "exponential alignment"
  -----------------------------------------------
  
 -      * Minor cleanups to daemon.c.
 -      * New URLs for home page and git services.
 -      * Improved error diagnostics for the mvblob commands.
 +      - Minor cleanups to daemon.c.
 +      - New URLs for home page and git services.
 +      - Improved error diagnostics for the mvblob commands.
 +      - New sender subcommand: status.
 +      - Improved help text for server and afs commands.
 +      - audiod memory leak fixes.
++      - oss_writer improvements.
  
  Download: ./releases/paraslash-git.tar.bz2
  

diff --cc audiod.c
Simple merge