* Network utils listens for network changes and updates dns servers in our resolver.
  * Other recent changes in earlier versions:
  * build.3263
  * - Fix blocked call at incoming state whereas other peer is connected.
  * build.3262
  * - Fix a problem with not finished zip files on macosx. Adjust some text.
  * build.3261
  * - Rename CreateAccountService to SIPAccountCreationFormService as it's used only in SIP wizards.
  * build.3260
  * - Increase receive buffer of the RTP socket because in case of high fps video, some packets could overflow the buffer (especially on Windows which has low receive buffer by default), which means that some packets will be dropped.
  * build.3259
  * - Moves logging configuration in separate bundle and add option to archive and save log files.
  * build.3258
  * - Reduce chat write area minimum height to fit in one line.
  * build.3257
  * - Fixes Esc behavior in chat window.
  * build.3256
  * - Temporary fix for chat conversation area line wrap problem.
  * build.3255
  * - Enable Twofish in SRTP to support ZRTP Twofish option
  * build.3254
  * - Enhanced chat window interface.
  * build.3253
  * - Tries even more (retardedly) to restore cygwin compatibility in the build of the Windows setup. (Unfortunately, breaks compatibility with the make of mingw-w64 MSYS.)
  * build.3252
  * - Fixes an IndexOutOfBoundsException which prevents the chat window from opening as reported by Yana Stamcheva on the dev mailing list in the thread 'Build 3250 chat window not opening'.
  * build.3251
  * - Does not hardcode a path in the build of the Windows setup.
  * - Fixes disappearing call history on search in the contact list. Call history records shown last.
  * - Tries to restore cygwin compatibility in the build of the Windows setup.
  * build.3250
  * - Possibly fixes an exception which could prevent the closing of MediaStreamImpl and would appear at times as the camera not closing after the end of the call.
  * - Keeps the About menu item at the end of the Help menu because it is its conventional position. Otherwise, the 'Check for updates' menu item would appear last at times (on Windows).
  * - Removes a duplicate method/an unnecessary method override.
  * - Adds ellipsis to the Add new account menu item because its dialog requires user input.
  * - Fixes multiple issues in the setup and update functionality on Windows.
  * - Do not flip desktop streaming image in preview.
  * - Remove tabs and formating text in directshow native code.
  * - Allow to pass incomplete encoded frame to H264 decoder.
  * - Remove redundant cast warning.
  * - Remove run.bat as it no-longer exists.
  * - When creating conference call check which contacs support it and offer only them.
  * - Pass the error if any to advance wizard so we will show an error and don't ignore it.
  * - Network utils listens for network changes and updates dns servers in our resolver.
  * build.3249
  * build.3248
  * - Fix shutting down sip stack when all providers go to connection failed. Fix start trying with first address on next reconnect when all addresses has failed this time. 
  * build.3247
  * - Fixes incoming and outgoing call image coming from contact list avatar.
  * build.3246
  * - Ask user for REFERS with unknown calls and decline them or ignore if not specified. Update installers logging properties.
  * - Missed in previous commit.
  * build.3245
  * - Fix jabber providers don't reconnect sometimes (happen when quick connect disconnect event occurs seen on macosx).
  * build.3244
  * - Fix new add contact and call video button images.