Use the ATTRIBUTE_NONNULL annotation to mark some virConnectPtr
args as mandatory non-null so the compiler can warn of mistakes

* src/conf/domain_event.h: All virConnectPtr args must be non-null
* src/qemu/qemu_conf.h: qemudBuildCommandLine and
  qemudNetworkIfaceConnect() must be given non-null connection
* tests/qemuxml2argvtest.c: Provide a non-null (dummy) connection to
  qemudBuildCommandLine()

The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in secret_conf.{h,c} and update all callers to
match

The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in interface_conf.{h,c} and update all callers to
match

The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in cpu_conf.{h,c} and update all callers to
match

The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in storage_conf.{h,c} and storage_encryption_conf.{h,c}
and update all callers to match

The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in node_device_conf.{h,c} and update all callers to
match

The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in network_conf.{h,c} and update all callers to
match

All callers now pass a NULL virConnectPtr into the USB/PCi device
iterator functions. Therefore the virConnectPtr arg can now be
removed from these functions

* src/util/hostusb.h, src/util/hostusb.c: Remove virConnectPtr
  from usbDeviceFileIterate
* src/util/pci.c, src/util/pci.h: Remove virConnectPtr arg from
  pciDeviceFileIterate
* src/qemu/qemu_security_dac.c, src/security/security_selinux.c: Update
  to drop redundant virConnectPtr arg

* src/qemu/qemu_conf.c: Fix ',' vs '.' typo in floppy disk arg

* proxy/libvirt_proxy.c: Remove 'conn' arg to virDomainDefFormat

The QEMU flags are commonly stored as a signed or unsigned int,
allowing only 31 flags. This limit is rather close, so to aid
future patches, change it to a 64-bit int

* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h, src/qemu/qemu_driver.c,
  tests/qemuargv2xmltest.c, tests/qemuhelptest.c, tests/qemuxml2argvtest.c:
  Use 'unsigned long long' for QEMU flags

The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in security_driver.{h,c} and update all callers to
match

The security driver was mistakenly initialized before the QEMU
config file was loaded. This prevents it being turned off again.
The capabilities XML was also getting the wrong security driver
name, due to the stacked driver arrangement.

* src/qemu/qemu_driver.c: Fix initialization order and capabilities
  model name

* src/util/util.h (virAsprintf): Remove ATTRIBUTE_RETURN_CHECK, since
it is perfectly fine to ignore the return value, now that the pointer
is guaranteed to be set to NULL upon failure.
* src/util/storage_file.c (absolutePathFromBaseFile): Remove now-
unnecessary use of ignore_value.

* src/util/storage_file.c (absolutePathFromBaseFile): While this use
of virAsprintf is slightly cleaner than using stpncpy(stpcpy(...,
it does impose an artificial limitation on the length of the base_file
name.  Rather than asserting that it does not exceed INT_MAX, return
NULL when it does.

* src/conf/node_device_conf.c: string saved into XML should be escaped
  with the use of virBufferEscapeString()

When creating preallocated large raw files opening them with O_DSYNC
prevents long delays in reading because cache pages can be immediately
reused without writing them on a disk first.

Re-generate remote protocol files for changes in commit
daeb6f6b

* daemon/remote_dispatch_args.h, daemon/remote_dispatch_prototypes.h,
  daemon/remote_dispatch_table.h, src/remote/remote_protocol.c,
  src/remote/remote_protocol.h: Re-generate files

It was used for error reporting only.

It was used for error reporting only.

It was used for error reporting only.

It was used for error reporting only.

It was used for error reporting only.

It was used for error reporting only.

Change all virsh commands that invoke virDomain{Attach,Detach}Device()
to use virDomain{Attach,Detach}DeviceFlags() instead.

Add a "--persistent" flag to these virsh commands, allowing user to
specify that the domain persisted config be modified as well.

V2: Only invoke virDomain{Attach,Detach}DeviceFlags() if
"--persistent" flag is specified.  Otherwise invoke
virDomain{Attach,Detach}Device() to retain current behavior.

Implementation of domain{Attach,Detach}DeviceFlags handlers
in the drivers.

Server side dispatcher for Domain{Attach,Detach}DeviceFlags.

Implementation of Domain{Attach,Detach}DeviceFlags in remote driver.

Definition of wire protocol format for
virDomain{Attach,Detach}DeviceFlags.

Implementation of public API for virDomain{Attach,Detach}DeviceFlags.

V2: Don't break remote compatibility with older libvirtd

Definition of internal API for virDomain{Attach,Detach}DeviceFlags.

Definition of public API for virDomain{Attach,Detach}DeviceFlags.

V2: Adjust libvrt_public.syms to anticipated 0.7.7 release.

virDomain{Attach,Detach}Device is now only permitted on active
domains.  Explicitly state this restriction in the API
documentation.

V2: Only change doc, dropping the hunk that forced the restriction
    in libvirt frontend.

* .gnulib: This fixes a warning in test-gettimeofday.c,
seen via "make check".  Reported by Daniel Veillard.