Update Changelog.

Changelog

@@ -1,4 +1,5 @@
-Unreleased - sledgehammer999 <sledgehammer999@qbittorrent.org> - v3.4.0
+* Mon Nov 20 2017 - sledgehammer999 <sledgehammer999@qbittorrent.org> - v4.0.0
+    - FEATURE: Change qbittorrent logo. Issue #6467. (HVS, Atif Afzal, sledgehammer999)
     - FEATURE: New icon theme with SVG source, so we can scale it appropriately in the future. (Bert Verhelst)
     - FEATURE: Drop Qt 4 support. Raise minimum Qt version to 5.5.1 (evsh)
     - FEATURE: UI for managing locally banned IP list (dzmat)
@@ -24,6 +25,7 @@ Unreleased - sledgehammer999 <sledgehammer999@qbittorrent.org> - v3.4.0
     - FEATURE: Add comboBox for selecting BitTorrent protocol. Closes #6316. (Chocobo1)
     - FEATURE: Allow SMTP sender to be set. Closes #7575. (Chocobo1)
     - FEATURE: Allow to specify if announcing to all tiers is desired. (sledgehammer999)
+    - FEATURE: Configurable number of history of paths in Add New Torrent dialog. (evsh)
     - BUGFIX: Adjust icons names to better fit FDO scheme (evsh)
     - BUGFIX: Optimized IP filter parsing, making blazingly fast (sledgehammer999, evsh)
     - BUGFIX: Fix dialogs didn't position on the correct screen which qBittorrent window is on. Closes #1690, #2474, #3538. (Chocobo1)
@@ -49,6 +51,7 @@ Unreleased - sledgehammer999 <sledgehammer999@qbittorrent.org> - v3.4.0
     - BUGFIX: Open links in browser. Closes #7651. (Chocobo1)
     - BUGFIX: Change default settings for tracker/tier announces to mimick μTorrent behavior. (sledgehammer999)
     - BUGFIX: Explicitly set UPnP state on start-up. Closes #7338. (Chocobo1)
+    - BUGFIX: Include/print caught signal in stackdump (Chocobo1)
     - COSMETIC: Trackerlist: Set text alignment of columns with numbers to the right (thalieht)
     - COSMETIC: Enable alternatingRowColors for "Manage Cookie" dialog (Chocobo1)
     - COSMETIC: Remove indentation for category/tag filter widgets in all platforms (thalieht)
@@ -73,13 +76,14 @@ Unreleased - sledgehammer999 <sledgehammer999@qbittorrent.org> - v3.4.0
     - WEBUI: Print error messages upon receiving invalid header fields. (Chocobo1)
     - WEBUI: Add WebUi\Address config option. (Matthew Fioravante)
     - WEBUI: Reinitialize webUI server when "IP address" setting changed. An app restart won't be necessary from now on. (Chocobo1)
-    - WEBUI: Improve log messages (Chocobo1)
+    - WEBUI: Improve log and error messages (Chocobo1)
     - SEARCH: Use explicit class for search plugin versions (evsh)
     - SEARCH: Remove all search plugins from repo. There is another repo named 'search-plugins'. (sledgehammer999)
     - SEARCH: Update the backend when a new plugin favicon is downloaded. (sledgehammer999)
     - SEARCH: Allow search plugins sorting. Closes #7526. (Nick Korotysh)
     - RSS: Redesigned RSS subsystem (glassez)
     - RSS: Do not use hardcoded colors in RSS feed view (evsh)
+    - RSS: Improve RSS events logging (glassez)
     - WINDOWS: Use dpiawareness=1 on Windows. Closes #5393. (sledgehammer999)
     - WINDOWS: Reformat Windows build configuration files. (glassez)
     - LINUX: Allow custom tray icons when system icon theme is used. Closes #7403. (evsh)
@@ -90,6 +94,7 @@ Unreleased - sledgehammer999 <sledgehammer999@qbittorrent.org> - v3.4.0
     - OTHER: Use new classes/methods from libtorrent and stop using deprecate ones. (glassez)
     - OTHER: Various string fixes (Allan Nordhøy, sledgehammer999)
     - OTHER: cmake: do not use Qt5Widgets when locating QtSingleApplication. Closes #7551. (evsh)
+    - OTHER: Update BOOST m4 macros and simplify AX_BOOST_BASE usage (Chocobo1)
     - OTHER: Drop OS/2 support. (sledgehammer999)
     - OTHER: Optimize file size of PNG and SVG files. (sledgehammer999)
     - OTHER: Add new translators in the About page.