Merge branch 'master' into package-management

Additional changes:
* Add src/system/kernel/lib/zlib, which builds a kernel version of zlib,
  needed by packagefs.
* BuildFeatures: Add a build feature "gcc2" to allow for easier checks.
* Referenceable.cpp: Include <OS.h> instead of <debugger.h>. The latter
  is not needed and prevents building for the build platform.
* zlib/zutil.h: Fix gcc 2 build. We really should use the external
  package instead.

Conflicts:
	.gitignore
	build/jam/BuildSetup
	build/jam/FileRules
	build/jam/FloppyBootImage
	build/jam/HaikuImage
	build/jam/ImageRules
	build/jam/KernelRules
	build/jam/NetBootArchive
	build/jam/OptionalBuildFeatures
	build/jam/OptionalLibPackages
	build/jam/OptionalPackageDependencies
	build/jam/OptionalPackages
	build/scripts/build_haiku_image
	configure
	data/bin/installoptionalpackage
	data/system/boot/Bootscript
	headers/os/app/Message.h
	headers/os/package/PackageInfo.h
	headers/os/package/PackageInfoAttributes.h
	headers/os/package/PackageInfoSet.h
	headers/os/package/PackageRoster.h
	headers/os/package/PackageVersion.h
	headers/os/package/hpkg/PackageInfoAttributeValue.h
	headers/os/storage/FindDirectory.h
	headers/os/storage/Node.h
	headers/os/support/StringList.h
	headers/private/system/directories.h
	src/add-ons/kernel/drivers/audio/ac97/es1370/Jamfile
	src/add-ons/kernel/file_systems/packagefs/AttributeIndex.cpp
	src/add-ons/kernel/file_systems/packagefs/Jamfile
	src/add-ons/kernel/file_systems/packagefs/Package.cpp
	src/add-ons/kernel/file_systems/packagefs/Package.h
	src/add-ons/kernel/file_systems/packagefs/PackageDomain.cpp
	src/add-ons/kernel/file_systems/packagefs/PackageDomain.h
	src/add-ons/kernel/file_systems/packagefs/PackageFSRoot.cpp
	src/add-ons/kernel/file_systems/packagefs/PackageLinkDirectory.cpp
	src/add-ons/kernel/file_systems/packagefs/PackageLinkDirectory.h
	src/add-ons/kernel/file_systems/packagefs/PackageLinkSymlink.cpp
	src/add-ons/kernel/file_systems/packagefs/PackageLinkSymlink.h
	src/add-ons/kernel/file_systems/packagefs/PackageLinksDirectory.cpp
	src/add-ons/kernel/file_systems/packagefs/PackageNode.h
	src/add-ons/kernel/file_systems/packagefs/ResolvableFamily.cpp
	src/add-ons/kernel/file_systems/packagefs/Version.cpp
	src/add-ons/kernel/file_systems/packagefs/Version.h
	src/add-ons/kernel/file_systems/packagefs/Volume.cpp
	src/add-ons/kernel/file_systems/packagefs/Volume.h
	src/add-ons/kernel/file_systems/packagefs/kernel_interface.cpp
	src/add-ons/kernel/file_systems/userlandfs/shared/driver_settings.c
	src/apps/deskbar/BarApp.cpp
	src/apps/deskbar/BarMenuBar.cpp
	src/apps/deskbar/BarMenuBar.h
	src/apps/deskbar/BarView.cpp
	src/apps/deskbar/BarView.h
	src/apps/deskbar/BarWindow.cpp
	src/apps/deskbar/BarWindow.h
	src/apps/deskbar/DeskbarMenu.cpp
	src/apps/deskbar/DeskbarMenu.h
	src/apps/deskbar/DeskbarUtils.cpp
	src/apps/deskbar/DeskbarUtils.h
	src/apps/deskbar/ExpandoMenuBar.cpp
	src/apps/deskbar/ExpandoMenuBar.h
	src/apps/deskbar/TeamMenu.cpp
	src/apps/processcontroller/ProcessController.cpp
	src/apps/remotedesktop/RemoteDesktop.cpp
	src/bin/bash/config-top.h
	src/bin/finddir.c
	src/bin/package/Jamfile
	src/bin/package/command_add.cpp
	src/bin/package/command_create.cpp
	src/bin/package/command_list.cpp
	src/bin/package_repo/command_list.cpp
	src/bin/pkgman/command_refresh.cpp
	src/build/libbe/support/Jamfile
	src/build/libpackage/Jamfile
	src/build/libroot/Jamfile
	src/build/libroot/fs.cpp
	src/build/libroot/remapped_functions.h
	src/kits/locale/MutableLocaleRoster.cpp
	src/kits/opengl/GLRendererRoster.cpp
	src/kits/package/PackageInfo.cpp
	src/kits/package/PackageInfoSet.cpp
	src/kits/package/PackageRoster.cpp
	src/kits/package/PackageVersion.cpp
	src/kits/package/RepositoryCache.cpp
	src/kits/package/hpkg/PackageWriterImpl.cpp
	src/kits/package/hpkg/ReaderImplBase.cpp
	src/kits/package/hpkg/WriterImplBase.cpp
	src/kits/print/PrintTransport.cpp
	src/kits/print/Printer.cpp
	src/kits/screensaver/ScreenSaverRunner.cpp
	src/kits/support/StringList.cpp
	src/kits/tracker/ContainerWindow.cpp
	src/kits/tracker/DeskWindow.cpp
	src/kits/tracker/PoseView.cpp
	src/libs/print/libprint/Transport.cpp
	src/preferences/printers/AddPrinterDialog.cpp
	src/preferences/screensaver/ScreenSaverWindow.cpp
	src/servers/debug/DebugServer.cpp
	src/servers/input/AddOnManager.cpp
	src/servers/media_addon/MediaAddonServer.cpp
	src/system/boot/Jamfile
	src/system/boot/loader/Jamfile
	src/system/boot/loader/loader.cpp
	src/system/boot/loader/vfs.cpp
	src/system/kernel/fs/vfs.cpp
	src/system/kernel/fs/vfs_boot.cpp
	src/system/libroot/os/find_directory.cpp
	src/system/runtime_loader/runtime_loader.cpp
	src/tools/package/Jamfile

build/jam/FileRules

@@ -199,7 +199,7 @@ rule ExtractArchive directory : entries : archiveFile : grist
 	# <directory> and <archiveFile> combo.
 	#
 	# <directory> - The directory into which to extract the archive file. The
-	#               directory is created is by this rule and it is the target
+	#               directory is created by this rule and it is the target
 	#               that the extract action is associated with.
 	# <entries>   - The entries of the archive file one is interested in. The
 	#               rule always extracts the complete archive file, from the
@@ -246,6 +246,9 @@ rule ExtractArchive directory : entries : archiveFile : grist
 				ExtractHPKGArchive1 $(directory)
 					: <build>package $(archiveFile) ;
 
+			case "" :
+				Exit "ExtractArchive: No archive passed" ;
+
 			case * :
 				Exit "ExtractArchive: Unhandled archive extension:"
 					"$(archiveFile:S)" ;