update libao.conf.5 man page to reflect that alsa points to alsa09 now,

patch from Kyungjoon Lee (closes ticket:722)


git-svn-id: http://svn.xiph.org/trunk/ao@10186 0101bb08-14d6-0310-b084-bc0e0c8e3800

libao.conf.5

@@ -47,9 +47,9 @@ Valid option keys are:
 .IP default_driver
 The short name of the driver libao should use by default.  Valid values
 include (not all are available on every platform): oss, esd, arts, alsa,
-alsa09, nas, irix, and sun.  Note that "sun" is used on many BSD
-systems as well as Solaris.  The "alsa" driver is for the 0.5.x ALSA API,
-whereas the "alsa09" driver is for the 0.9.x API.
+alsa05, nas, irix, and sun.  Note that "sun" is used on many BSD
+systems as well as Solaris.  The "alsa" driver is for the 0.9.x ALSA API,
+whereas the "alsa05" driver is for the 0.5.x API.
 .RE
 
 .SH EXAMPLE