[apinotes] Change to nullable parameter for NSZoneName.
[apinotes] Change to nullable parameter for NSZoneName.

Documentation for NSZoneName says:
"If zone is nil, the default zone is used".

Swift SVN r24731

hooman/swift,JGiola/swift,natecook1000/swift,swiftix/swift.old,swiftix/swift.old,ken0nek/swift,airspeedswift/swift,cbrentharris/swift,tinysun212/swift-windows,deyton/swift,xedin/swift,IngmarStein/swift,russbishop/swift,frootloops/swift,KrishMunot/swift,kstaring/swift,shahmishal/swift,CodaFi/swift,jmgc/swift,stephentyrone/swift,jckarter/swift,gribozavr/swift,xwu/swift,therealbnut/swift,nathawes/swift,lorentey/swift,milseman/swift,russbishop/swift,natecook1000/swift,JGiola/swift,swiftix/swift.old,jopamer/swift,return/swift,OscarSwanros/swift,glessard/swift,swiftix/swift,gribozavr/swift,brentdax/swift,devincoughlin/swift,harlanhaskins/swift,tjw/swift,therealbnut/swift,codestergit/swift,devincoughlin/swift,nathawes/swift,tardieu/swift,stephentyrone/swift,huonw/swift,dduan/swift,hughbe/swift,shajrawi/swift,shahmishal/swift,arvedviehweger/swift,jckarter/swift,ahoppen/swift,lorentey/swift,airspeedswift/swift,hughbe/swift,roambotics/swift,gribozavr/swift,gmilos/swift,emilstahl/swift,cbrentharris/swift,ben-ng/swift,manavgabhawala/swift,jopamer/swift,gregomni/swift,airspeedswift/swift,gribozavr/swift,uasys/swift,allevato/swift,gmilos/swift,gmilos/swift,gottesmm/swift,aschwaighofer/swift,danielmartin/swift,jtbandes/swift,shahmishal/swift,dduan/swift,manavgabhawala/swift,zisko/swift,Ivacker/swift,gregomni/swift,swiftix/swift.old,jtbandes/swift,adrfer/swift,MukeshKumarS/Swift,kperryua/swift,JaSpa/swift,return/swift,swiftix/swift,karwa/swift,therealbnut/swift,cbrentharris/swift,apple/swift,practicalswift/swift,russbishop/swift,kusl/swift,gottesmm/swift,gribozavr/swift,austinzheng/swift,xwu/swift,tinysun212/swift-windows,ben-ng/swift,adrfer/swift,hughbe/swift,Jnosh/swift,parkera/swift,harlanhaskins/swift,calebd/swift,jckarter/swift,JGiola/swift,mightydeveloper/swift,aschwaighofer/swift,adrfer/swift,brentdax/swift,gribozavr/swift,OscarSwanros/swift,roambotics/swift,glessard/swift,mightydeveloper/swift,sdulal/swift,gottesmm/swift,kentya6/swift,rudkx/swift,Jnosh/swift,shahmishal/swift,modocache/swift,khizkhiz/swift,hughbe/swift,tkremenek/swift,johnno1962d/swift,aschwaighofer/swift,tjw/swift,JaSpa/swift,JaSpa/swift,ben-ng/swift,parkera/swift,johnno1962d/swift,arvedviehweger/swift,atrick/swift,milseman/swift,allevato/swift,KrishMunot/swift,Ivacker/swift,hughbe/swift,shajrawi/swift,huonw/swift,amraboelela/swift,atrick/swift,mightydeveloper/swift,lorentey/swift,karwa/swift,djwbrown/swift,gribozavr/swift,kperryua/swift,modocache/swift,natecook1000/swift,calebd/swift,tinysun212/swift-windows,dreamsxin/swift,ahoppen/swift,emilstahl/swift,benlangmuir/swift,kusl/swift,uasys/swift,apple/swift,tkremenek/swift,JaSpa/swift,aschwaighofer/swift,glessard/swift,rudkx/swift,lorentey/swift,rudkx/swift,kentya6/swift,gottesmm/swift,nathawes/swift,practicalswift/swift,tardieu/swift,frootloops/swift,kperryua/swift,austinzheng/swift,amraboelela/swift,felix91gr/swift,kstaring/swift,johnno1962d/swift,apple/swift,dduan/swift,jopamer/swift,therealbnut/swift,glessard/swift,jopamer/swift,felix91gr/swift,mightydeveloper/swift,xedin/swift,gmilos/swift,tjw/swift,shajrawi/swift,natecook1000/swift,karwa/swift,frootloops/swift,kentya6/swift,SwiftAndroid/swift,harlanhaskins/swift,arvedviehweger/swift,brentdax/swift,zisko/swift,jckarter/swift,mightydeveloper/swift,harlanhaskins/swift,practicalswift/swift,MukeshKumarS/Swift,benlangmuir/swift,cbrentharris/swift,milseman/swift,therealbnut/swift,calebd/swift,roambotics/swift,austinzheng/swift,natecook1000/swift,glessard/swift,tinysun212/swift-windows,xwu/swift,practicalswift/swift,codestergit/swift,deyton/swift,shajrawi/swift,bitjammer/swift,zisko/swift,codestergit/swift,codestergit/swift,jtbandes/swift,cbrentharris/swift,huonw/swift,hughbe/swift,sschiau/swift,tinysun212/swift-windows,LeoShimonaka/swift,modocache/swift,SwiftAndroid/swift,IngmarStein/swift,sdulal/swift,Jnosh/swift,glessard/swift,tkremenek/swift,dduan/swift,gottesmm/swift,slavapestov/swift,cbrentharris/swift,huonw/swift,calebd/swift,ahoppen/swift,parkera/swift,ben-ng/swift,Ivacker/swift,djwbrown/swift,tardieu/swift,sdulal/swift,tjw/swift,MukeshKumarS/Swift,swiftix/swift.old,roambotics/swift,kentya6/swift,danielmartin/swift,allevato/swift,kperryua/swift,gregomni/swift,amraboelela/swift,felix91gr/swift,OscarSwanros/swift,emilstahl/swift,jopamer/swift,Ivacker/swift,tjw/swift,JGiola/swift,KrishMunot/swift,milseman/swift,gottesmm/swift,tjw/swift,Jnosh/swift,gribozavr/swift,zisko/swift,manavgabhawala/swift,jtbandes/swift,benlangmuir/swift,tkremenek/swift,amraboelela/swift,atrick/swift,devincoughlin/swift,ahoppen/swift,IngmarStein/swift,sdulal/swift,mightydeveloper/swift,tardieu/swift,parkera/swift,shajrawi/swift,xwu/swift,practicalswift/swift,lorentey/swift,CodaFi/swift,rudkx/swift,ken0nek/swift,huonw/swift,djwbrown/swift,ahoppen/swift,swiftix/swift.old,djwbrown/swift,lorentey/swift,airspeedswift/swift,return/swift,stephentyrone/swift,xedin/swift,slavapestov/swift,LeoShimonaka/swift,swiftix/swift.old,codestergit/swift,modocache/swift,kstaring/swift,SwiftAndroid/swift,felix91gr/swift,gregomni/swift,jckarter/swift,bitjammer/swift,gregomni/swift,brentdax/swift,shahmishal/swift,arvedviehweger/swift,rudkx/swift,frootloops/swift,uasys/swift,modocache/swift,ahoppen/swift,dreamsxin/swift,johnno1962d/swift,LeoShimonaka/swift,djwbrown/swift,uasys/swift,shahmishal/swift,devincoughlin/swift,practicalswift/swift,austinzheng/swift,allevato/swift,arvedviehweger/swift,amraboelela/swift,deyton/swift,hooman/swift,djwbrown/swift,MukeshKumarS/Swift,benlangmuir/swift,khizkhiz/swift,KrishMunot/swift,alblue/swift,russbishop/swift,amraboelela/swift,allevato/swift,danielmartin/swift,manavgabhawala/swift,dduan/swift,alblue/swift,ken0nek/swift,hooman/swift,allevato/swift,benlangmuir/swift,jopamer/swift,khizkhiz/swift,kusl/swift,jckarter/swift,modocache/swift,johnno1962d/swift,arvedviehweger/swift,danielmartin/swift,dduan/swift,kstaring/swift,hooman/swift,airspeedswift/swift,JGiola/swift,JaSpa/swift,sdulal/swift,return/swift,emilstahl/swift,LeoShimonaka/swift,lorentey/swift,khizkhiz/swift,atrick/swift,karwa/swift,sschiau/swift,therealbnut/swift,ben-ng/swift,tkremenek/swift,ken0nek/swift,xwu/swift,tkremenek/swift,IngmarStein/swift,ken0nek/swift,gottesmm/swift,kusl/swift,swiftix/swift,jmgc/swift,calebd/swift,shajrawi/swift,ken0nek/swift,nathawes/swift,shahmishal/swift,KrishMunot/swift,allevato/swift,devincoughlin/swift,shahmishal/swift,deyton/swift,Ivacker/swift,kperryua/swift,tardieu/swift,Jnosh/swift,stephentyrone/swift,milseman/swift,swiftix/swift,parkera/swift,alblue/swift,frootloops/swift,karwa/swift,kentya6/swift,felix91gr/swift,roambotics/swift,kperryua/swift,kentya6/swift,jmgc/swift,return/swift,johnno1962d/swift,lorentey/swift,milseman/swift,xwu/swift,tinysun212/swift-windows,LeoShimonaka/swift,frootloops/swift,danielmartin/swift,cbrentharris/swift,CodaFi/swift,cbrentharris/swift,emilstahl/swift,SwiftAndroid/swift,hooman/swift,brentdax/swift,danielmartin/swift,slavapestov/swift,xedin/swift,austinzheng/swift,stephentyrone/swift,OscarSwanros/swift,gmilos/swift,brentdax/swift,alblue/swift,nathawes/swift,aschwaighofer/swift,slavapestov/swift,parkera/swift,bitjammer/swift,sschiau/swift,felix91gr/swift,russbishop/swift,return/swift,russbishop/swift,gregomni/swift,emilstahl/swift,airspeedswift/swift,zisko/swift,mightydeveloper/swift,stephentyrone/swift,ken0nek/swift,swiftix/swift,harlanhaskins/swift,alblue/swift,sdulal/swift,bitjammer/swift,aschwaighofer/swift,devincoughlin/swift,MukeshKumarS/Swift,swiftix/swift,swiftix/swift.old,deyton/swift,Jnosh/swift,airspeedswift/swift,emilstahl/swift,felix91gr/swift,adrfer/swift,adrfer/swift,calebd/swift,gmilos/swift,sdulal/swift,xedin/swift,KrishMunot/swift,sschiau/swift,zisko/swift,gmilos/swift,jtbandes/swift,JaSpa/swift,alblue/swift,OscarSwanros/swift,sschiau/swift,calebd/swift,harlanhaskins/swift,kstaring/swift,khizkhiz/swift,brentdax/swift,nathawes/swift,shajrawi/swift,LeoShimonaka/swift,jmgc/swift,nathawes/swift,manavgabhawala/swift,bitjammer/swift,alblue/swift,modocache/swift,jtbandes/swift,kusl/swift,karwa/swift,deyton/swift,manavgabhawala/swift,jopamer/swift,kusl/swift,ben-ng/swift,LeoShimonaka/swift,MukeshKumarS/Swift,CodaFi/swift,tardieu/swift,frootloops/swift,KrishMunot/swift,practicalswift/swift,tardieu/swift,manavgabhawala/swift,jmgc/swift,devincoughlin/swift,khizkhiz/swift,SwiftAndroid/swift,CodaFi/swift,austinzheng/swift,rudkx/swift,CodaFi/swift,LeoShimonaka/swift,karwa/swift,roambotics/swift,atrick/swift,johnno1962d/swift,Ivacker/swift,harlanhaskins/swift,tinysun212/swift-windows,kstaring/swift,sschiau/swift,xedin/swift,huonw/swift,ben-ng/swift,aschwaighofer/swift,natecook1000/swift,OscarSwanros/swift,tjw/swift,zisko/swift,hughbe/swift,JGiola/swift,stephentyrone/swift,parkera/swift,codestergit/swift,milseman/swift,codestergit/swift,Jnosh/swift,huonw/swift,arvedviehweger/swift,parkera/swift,adrfer/swift,dduan/swift,Ivacker/swift,mightydeveloper/swift,kentya6/swift,apple/swift,JaSpa/swift,shajrawi/swift,devincoughlin/swift,bitjammer/swift,sschiau/swift,slavapestov/swift,emilstahl/swift,austinzheng/swift,apple/swift,xedin/swift,OscarSwanros/swift,xwu/swift,sdulal/swift,slavapestov/swift,khizkhiz/swift,CodaFi/swift,return/swift,kperryua/swift,tkremenek/swift,atrick/swift,kstaring/swift,jmgc/swift,apple/swift,kentya6/swift,Ivacker/swift,therealbnut/swift,uasys/swift,xedin/swift,IngmarStein/swift,slavapestov/swift,MukeshKumarS/Swift,SwiftAndroid/swift,adrfer/swift,SwiftAndroid/swift,swiftix/swift,bitjammer/swift,djwbrown/swift,practicalswift/swift,kusl/swift,danielmartin/swift,benlangmuir/swift,uasys/swift,hooman/swift,russbishop/swift,kusl/swift,jtbandes/swift,jmgc/swift,IngmarStein/swift,uasys/swift,amraboelela/swift,hooman/swift,natecook1000/swift,jckarter/swift,sschiau/swift,karwa/swift,IngmarStein/swift,deyton/swift