readme-qt.rst: Update Debian pkg list and UPNP defaultiness

doc/readme-qt.rst

@@ -14,7 +14,7 @@ distribution are installed, for Debian and Ubuntu these are:
 
     apt-get install qt4-qmake libqt4-dev build-essential libboost-dev libboost-system-dev \
         libboost-filesystem-dev libboost-program-options-dev libboost-thread-dev \
-        libssl-dev libdb4.8++-dev
+        libssl-dev libdb++-dev libminiupnpc-dev
 
 then execute the following:
 
@@ -78,21 +78,21 @@ To use UPnP for port forwarding behind a NAT router (recommended, as more connec
 
 ::
 
-    qmake "USE_UPNP=1"
+    qmake "USE_UPNP=1"      # This is the default
 
 (in **Qt Creator**, you can find the setting for additional qmake arguments under "Projects" -> "Build Settings" -> "Build Steps", then click "Details" next to **qmake**)
 
 This requires miniupnpc for UPnP port mapping.  It can be downloaded from
-http://miniupnp.tuxfamily.org/files/.  UPnP support is not compiled in by default.
+http://miniupnp.tuxfamily.org/files/.  UPnP support is compiled in by default.
 
 Set USE_UPNP to a different value to control this:
 
 +------------+--------------------------------------------------------------------------+
 | USE_UPNP=- | no UPnP support, miniupnpc not required;                                 |
 +------------+--------------------------------------------------------------------------+
-| USE_UPNP=0 | (the default) built with UPnP, support turned off by default at runtime; |
+| USE_UPNP=0 | built with UPnP, support turned off by default at runtime;               |
 +------------+--------------------------------------------------------------------------+
-| USE_UPNP=1 | build with UPnP support turned on by default at runtime.                 |
+| USE_UPNP=1 | (the default) build with UPnP support turned on by default at runtime.   |
 +------------+--------------------------------------------------------------------------+
 
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