Re #1134 (misc fixes): fixed various doxygen warnings, as well as added overview section in pjmedia documentation

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@3327 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjmedia/include/pjmedia-audiodev/audiodev.h b/pjmedia/include/pjmedia-audiodev/audiodev.h
index 09c6209..ba28bc0 100644
--- a/pjmedia/include/pjmedia-audiodev/audiodev.h
+++ b/pjmedia/include/pjmedia-audiodev/audiodev.h
@@ -455,7 +455,7 @@
  *
  * @param param		The structure.
  * @param cap		The audio capability which value is to be set.
- * @param value		Pointer to value. Please see the type of value to
+ * @param pval		Pointer to value. Please see the type of value to
  *			be supplied in the pjmedia_aud_dev_cap documentation.
  *
  * @return		PJ_SUCCESS on successful operation or the appropriate
@@ -473,7 +473,7 @@
  *
  * @param param		The structure.
  * @param cap		The audio capability which value is to be retrieved.
- * @param value		Pointer to value. Please see the type of value to
+ * @param pval		Pointer to value. Please see the type of value to
  *			be supplied in the pjmedia_aud_dev_cap documentation.
  *
  * @return		PJ_SUCCESS on successful operation or the appropriate