Merge branch 'android-ndk'

This branch comes with some preliminary changes for the user-land IPsec
implementation and the Android App.

One important change is that the UDP ports used by the socket-default plugin
were made configurable (either via ./configure or strongswan.conf).
Also, the plugin does randomly allocate a port if it is configured to 0,
which is useful for client implementations.  A consequence of these
changes is that the local UDP port used when creating ike_cfg_t objects has
to be fetched from the socket.

src/libcharon/Makefile.am

@@ -456,6 +456,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_ANDROID_LOG
+  SUBDIRS += plugins/android_log
+if MONOLITHIC
+  libcharon_la_LIBADD += plugins/android_log/libstrongswan-android-log.la
+endif
+endif
+
 if USE_MAEMO
   SUBDIRS += plugins/maemo
 if MONOLITHIC