Merge branch 't/libao'

diff --cc Makefile.in
Simple merge

diff --cc NEWS
index 3295738632ef423ca4b36f68f3bcdc533d873e38,3443ebb3d5362afd5a72d1ba8d415d6c193217c9..4430343ec73e641f401263aee9e3dbefb2aa5993
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -2,11 -2,8 +2,13 @@@
  0.4.7 (to be announced) "infinite rollback"
  -------------------------------------------
  
++      - Support for ESD, Pulseaudio, AIX, Solaris, IRIX and other
++        platforms through the libao audio library.
        - configure: improved options for ogg/vorbis/speex.
        - The git version reported by --version always matches HEAD.
 +      - The autogen script detects the number of processors and
 +        runs a parallel make if possible.
 +      - Major cleanup of the crypto API.
  
  ------------------------------------------
  0.4.6 (2011-03-31) "deterministic entropy"

diff --cc configure.ac
Simple merge

diff --cc error.h
Simple merge

diff --cc web/manual.m4
Simple merge