r4216 and 4217 in private: Make multiple attempts at TCH channel assignment.  (Yes, I saw this do something useful during one test.) Log abmormal Disconnect and Release at NOTICE level.
r4216 and 4217 in private:
Make multiple attempts at TCH channel assignment.  (Yes, I saw this do something useful during one test.)
Log abmormal Disconnect and Release at NOTICE level.

Accessors for Cause element in L3 CC Release.

git-svn-id: 504cad4147f1e500be0a169b9f46375eaf875953@4350 19bc5d8c-e614-43d4-8b26-e1612bc8e597

hongyunnchen/openbts,Djimmer/obts,xyzr0482/openbts,endaga/openbts,maxifree/openbts,WindyCitySDR/openbts,brunoflce/pessoalopenBTS,dhenyjarasandy/openbts,brunoflce/pessoalopenBTS,hongyunnchen/openbts,RangeNetworks/openbts,WindyCitySDR/openbts,Djimmer/obts,maxifree/openbts,endaga/openbts,brunoflce/pessoalopenBTS,RangeNetworks/openbts,endaga/openbts,Djimmer/obts,Djimmer/obts,xyzr0482/openbts,endaga/openbts,maxifree/openbts,dhenyjarasandy/openbts,dhenyjarasandy/openbts,RangeNetworks/openbts,hongyunnchen/openbts,RangeNetworks/openbts,maxifree/openbts,xyzr0482/openbts,WindyCitySDR/openbts,RangeNetworks/openbts,WindyCitySDR/openbts,brunoflce/pessoalopenBTS,xyzr0482/openbts,hongyunnchen/openbts,xyzr0482/openbts,maxifree/openbts,endaga/openbts,dhenyjarasandy/openbts,dhenyjarasandy/openbts,brunoflce/pessoalopenBTS,Djimmer/obts,RangeNetworks/openbts,WindyCitySDR/openbts,Djimmer/obts,hongyunnchen/openbts