stale doc references to symbian .org

symbian.org site is down permanently as of 12-2010. Qt docs have some references to the site's links, which do not work anymore. corresponding content needs to be found elsewhere (doing the same for mobility atm).

grep over qt master (from wk11):

grep -r "symbian.org" .

./doc/src/platforms/platform-notes.qdoc: \o \c AllFiles when \l

{http://developer.symbian.org/wiki/index.php/Capabilities_%28Symbian_Signed%29/AllFiles_Capability} {accessing specific areas.}

./doc/src/getting-started/installation.qdoc: SBSv2 (also known as \l

{http://developer.symbian.org/wiki/index.php/Introduction_to_RAPTOR}

{Raptor}

)
./doc/src/getting-started/installation.qdoc: We recommend you to take a look at \l

{http://developer.symbian.org/wiki/index.php/Qt_Quick_Start} {Symbian Foundation - Qt Quick Start}

./doc/src/external-resources.qdoc: \externalpage http://developer.symbian.org/wiki/index.php/Platform_Security_%28Fundamentals_of_Symbian_C%2B%2B%29#Self-Signed_Applications
./doc/src/external-resources.qdoc: \externalpage http://developer.symbian.org/wiki/index.php/Deploying_a_Qt_Application
./doc/src/development/qmake-manual.qdoc: please refer to the \l

{Symbian SDK documentation} {http://developer.symbian.org/main/documentation/reference/s3/pdk/GUID-380A8C4F-3EB6-5E1C-BCFB-ED5B866136D9.html}