Add a variant of virXPathULong() which can handle long longs.

Needed for parsing storage device capacities.

Add new functions to allow parsing integers with base 16

This will be used to e.g. parse PCI vendor IDs.

The 'asprintf' -> 'virAsprintf' transition made in
[043d702f] "use virAsprintf instead of asprintf" introducted
a build error for 'driver.c' as 'util.h' has to be included.
Signed-off-by: NMaximilian Wilhelm <max@rfc2324.org>

The 'getVer' fix introducted in d88d459d [Allow remote://hostname/
style URIs for automatic driver probe...] breaks compiling libvirt
with loadable module support.  Work around this to get it building again.
Signed-off-by: NMaximilian Wilhelm <max@rfc2324.org>

* src/bridge.c (brProbeVnetHdr)
[IFF_VNET_HDR && TUNGETFEATURES && TUNGETIFF]: Use a "(void)" case
to mark the parameter as unused.  Reported by Maximilian Wilhelm in
http://thread.gmane.org/gmane.comp.emulators.libvirt/11918/focus=11917

* configure.in: Enable internal WITH_BRIDGE support not just for LXC or
QEMU, but also for --with-network.  Russell Haering reported that
compilation failed when configured with --without-lxc --without-qemu.
Details: http://thread.gmane.org/gmane.comp.emulators.libvirt/11928
* src/bridge.h: Use #if WITH_BRIDGE, rather than currently-equivalent
"#if defined(WITH_QEMU) || defined(WITH_LXC)"

Re-factor the code from networkEnableIpForwarding() into a
utility function in preparation for code which writes to
sysfs files.

Just some copy-and-paste mixups.

It looks like these functions have never existed.

 bridge.c: In function 'brSetInetAddr':
 bridge.c:665: error: dereferencing pointer '({anonymous})' does break strict-aliasing rules
 bridge.c:665: note: initialized from here
 bridge.c:666: error: dereferencing pointer '({anonymous})' does break strict-aliasing rules
 bridge.c:666: note: initialized from here

Fix qemud.c warnings with gcc-4.4

 qemud.c: In function ‘remoteListenTCP’:
 qemud.c:675: error: dereferencing pointer ‘sa.72’ does break strict-aliasing rules
 qemud.c:675: note: initialized from here
 qemud.c:678: error: dereferencing pointer ‘sa.73’ does break strict-aliasing rules
 qemud.c:678: note: initialized from here

* src/test.c (testNetworkCreate, testNetworkDefine): Since "def" is
set to NULL immediately after any vir*AssignDef call (to indicate we
no longer own it and to ensure no clean-up path mistakenly frees it),
dereference via net->def->, not def->.

        connection error, which may not have been set.

* qemud/qemud.c (GET_CONF_STR): Use virStrerror, not strerror.
* qemud/remote.c (remoteDispatchDomainBlockPeek): Likewise.
(remoteDispatchDomainMemoryPeek, remoteDispatchAuthSaslInit): Likewise.
(remoteDispatchAuthPolkit): Likewise.
* src/lxc_container.c (lxcContainerAvailable): Likewise.
* src/network_driver.c (networkStartNetworkDaemon): Likewise.
(networkShutdownNetworkDaemon): Likewise.
* src/qemu_conf.c (qemudExtractVersion, qemudNetworkIfaceConnect):
* src/storage_conf.c (virStoragePoolLoadAllConfigs): Likewise.
* src/storage_driver.c (storagePoolUndefine): Likewise.
* src/uml_driver.c (umlStartup, umlStartVMDaemon): Likewise.
* src/util.c (virFileReadAll): Likewise.
* src/uuid.c (virUUIDGenerate): Likewise.
* src/xen_internal.c (get_cpu_flags): Likewise.

* src/uml_driver.c (umlStartVMDaemon): Don't print raw errno value.
* qemud/remote.c (remoteDispatchAuthSaslInit): Likewise.

* src/iptables.c: Include "virterror_internal.h".
Use virStrerror, not strerror.
* src/iptables.c (notifyRulesUpdated): Use %s rather than
string-concatenation that made sc_unmarked_diagnostics report
a false-positive.

* src/qemu_driver.c (qemudDomainSave, qemudDomainRestore)
(qemudDomainAttachPciDiskDevice)
(qemudDomainAttachUsbMassstorageDevice):

Perform most changs automatically, with this:
perl -pi -e 's/\bstrerror *\((.+?)\)/virStrerror($1, ebuf, sizeof ebuf)/'
Then, declare ebuf, as needed

* src/qemu_driver.c: Use virSetCloseExec and virSetNonBlock,
rather than qemuSet* functions.  Suggested by Daniel P. Berrange.
* src/util.c (virSetCloseExec): Publicize.
* src/util.h (virSetCloseExec): Declare
* src/libvirt_private.syms: Add virSetCloseExec.

...thus eliminating many uses of strerror.
(kvmGetMaxVCPUs): Rather than merely warning, diagnose an error
and return -1 upon failure to open KVM_DEVICE.  Suggested by
Daniel P. Berrange.

* src/virterror.c (virStrerror): Remove "static".
* src/virterror_internal.h (virStrerror): Declare it.
* src/libvirt_private.syms: Add virStrerror;

* src/bridge.c (brAddTap): Remove redundant errno=ENOMEM assignment
after failed strdup.
* src/cgroup.c (virCgroupFree): Remove redundant *group=NULL assignment
after VIR_FREE(*group).
* src/lxc_driver.c (lxcShutdown): Likewise.
* src/xen_unified.c (xenUnifiedClose): Likewise.
* src/xm_internal.c (xenXMDomainConfigFormat): Rewrite disk-
and net-config-setting code to be clearer.

* src/lxc_container.c (lxcContainerPivotRoot): Free and zero
oldroot *after* printing the diagnostic, both for virFileMakePath
and pivot_root failure.

* src/qemu_driver.c (qemudStartVMDaemon): Use "%s".