Fix compilation warnings in smtp.h (cgreco)

INSTALL

@@ -0,0 +1,56 @@
+qBittorrent - A BitTorrent client in C++ / Qt4
+------------------------------------------
+
+1) Compile and install qBittorrent with Qt4 Graphical Interface
+
+  $ ./configure
+  $ make && make install
+  $ qbittorrent
+
+  will install and execute qBittorrent hopefully without any problems.
+
+  Dependencies:
+    - Qt >= 4.5.0 (libqtgui, libqtcore, libqtnetwork, libqtxml, libqtdbus/optional)
+
+    - pkg-config executable
+
+    - libtorrent-rasterbar by Arvid Norberg (>= 0.14.4 REQUIRED, compatible with v0.15.x)
+        -> http://www.libtorrent.net
+        Be careful: another library (the one used by rTorrent) uses a similar name.
+
+    - libboost 1.34.x (libboost-filesystem, libboost-date-time) + libasio
+      or
+    - libboost >= 1.35.x (libboost-system, libboost-filesystem, libboost-date-time)
+
+    - python >= 2.3 && < 3.0 (needed by search engine)
+        * Run time only dependency
+
+    - geoip-database (optional)
+        * If qBittorrent cannot find this database, it will try to resolve countries using the Internet but it will be a lot slower.
+        * Run time only dependency
+
+2) Compile and install qBittorrent without Qt4 Graphical interface
+
+  $ ./configure --disable-gui
+  $ make && make install
+  $ qbittorrent
+
+  will install and execute qBittorrent hopefully without any problems.
+
+  Dependencies:
+    - Qt >= 4.4.0 (libqt-devel, libqtcore, libqtnetwork)
+
+    - pkg-config executable
+
+    - libtorrent-rasterbar by Arvid Norberg (>= 0.14.4 REQUIRED, >= v0.15.0 ADVISED)
+        -> http://www.libtorrent.net
+        Be careful: another library (the one used by rTorrent) uses a similar name.
+
+    - libboost: libboost-filesystem, libboost-date-time, libboost-thread, libboost-serialization
+
+
+DOCUMENTATION:
+Please note that there is a documentation with a "compiling howto" at http://wiki.qbittorrent.org.
+
+------------------------------------------
+Christophe Dumez <chris@qbittorrent.org>