We have no internal public APIs, really

Internal public API is quite an oxymoron, but surely these are not
the modules one needs to encounter first when coming to librpm.
Lump the stuff under IO, burying it last. Also gets rid of a
doxygen warning during generation wrt internalargv.

doc/librpm/Doxyheader.h

@@ -9,31 +9,6 @@
     - or \link rpmts	(un)installing \endlink RPM packages.
 
  */
-/** \defgroup internalargv Internal APIs:
- *
- * @{
- */
-/** \defgroup internalargv CLI Arguments:
- *
- * @{
- */
-/** \defgroup	rpmargv	Argument Manipulation API.
-    \brief Argument Manipulation API (internal).
- */
-/** \defgroup	rpmcli	Command Line API.
-    \brief Parsing RPM command line arguments (internal).
- */
-/** @} */
-/** \defgroup	rpmsq	Signal Queue API.
-    \brief Signal Queue API (internal).
- */
-/** \defgroup	rpmsw	Statistics API.
-    \brief Statistics API (internal).
- */
-/** \defgroup	rpmrc	RPMRC.
-    \brief Reading config files and getting some important configuration values.
- */
-/** @} */
 /** \defgroup buildsign Building & signing packages:
  *
  * @{
@@ -142,4 +117,20 @@
 /** \defgroup	rpmurl	URL Manipulation API.
     \brief A couple utils for URL Manipulation.
  */
+/** \defgroup	rpmargv	Argument Manipulation API.
+    \brief Argument Manipulation API.
+ */
+/** \defgroup	rpmcli	Command Line API.
+    \brief Parsing RPM command line arguments.
+ */
+/** @} */
+/** \defgroup	rpmsq	Signal Queue API.
+    \brief Signal Queue API.
+ */
+/** \defgroup	rpmsw	Statistics API.
+    \brief Statistics API.
+ */
+/** \defgroup	rpmrc	RPMRC.
+    \brief Reading config files and getting some important configuration values.
+ */
 /** @} */