PciIoAttributes() in PciIo.c treats EFI_PCI_DEVICE_ENABLE specially so that when EFI_PCI_DEVICE_ENABLE is passed in, only the supported bits of driver will be enabled. Now many drivers use EFI_PCI_DEVICE_ENABLE to enable PCI device even if some of them don't support some of the attributes like EFI_PCI_IO_ATTRIBUTE_MEMORY. This doesn't conform to UEFI 2.0 spec.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4115 6f19259b-4bc3-4df7-8a09-765794883524
2. Add default branch to meet CYGWINGCC build in Tcp4Dispatcher.c.
3. Sync the latest network stack library.
4. Fixed one bug in Mtftp4Support.c, for AsciiStrCpy() return the pointer to head of string, not the tail of string.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3741 6f19259b-4bc3-4df7-8a09-765794883524