headers: Some trivial fixes for some documentation typos

Note also the willneed/will_need inconsistency. I guess it could be nice to ASAP
choose one of them and introduce a backward compatibility hack for the other.

The issues was mostly found with:
for a in $(grep -r '^[ /]\*.*()' $(
	find -name '*.[ch]') |
	sed 's,^.* \([^ ]*\)().*$,\1,g' |
	sort |
	uniq |
	grep ^pa_)
do
	grep -rq "^.[^*].*\<$a(" $(find * -name '*.h') || echo $a
done

src/pulse/def.h

@@ -63,6 +63,7 @@ static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x) {
 #define PA_CONTEXT_SETTING_NAME PA_CONTEXT_SETTING_NAME
 #define PA_CONTEXT_READY PA_CONTEXT_READY
 #define PA_CONTEXT_FAILED PA_CONTEXT_FAILED
+#define PA_CONTEXT_TERMINATED PA_CONTEXT_TERMINATED
 #define PA_CONTEXT_IS_GOOD PA_CONTEXT_IS_GOOD
 /** \endcond */
 
@@ -351,7 +352,7 @@ typedef struct pa_buffer_attr {
      * that may be. Initialize to 0 to enable manual start/stop
      * control of the stream. This means that playback will not stop
      * on underrun and playback will not start automatically. Instead
-     * pa_stream_corked() needs to be called explicitly. If you set
+     * pa_stream_cork() needs to be called explicitly. If you set
      * this value to 0 you should also set PA_STREAM_START_CORKED. */
 
     uint32_t minreq;