More bugfree release

Many fixes, and quite a few new features too:

• Dependency on stdext 2.0.0
• Added capability Vdi_mirror to the storage layer
• VM.call_plugin suppor
• New Xen CPU feature levelling support
• TLS configuration
• Refactoring of the SXM code

More bugfixes

• storage: plugging on a slave before a master is now an error
• xenvmd is restarted over master transitions
• preliminary support for SR-level RRDs
• storage: a plugin can have cluster stack constraints
• support for a windows VM drivers upgrade tool 'xenprep'
• change queue prefix to org.xen.xapi
• add XenAPI extension mechanism
• add LVHD thin provisioning upgrade API
• support polling modes for VBDs
• storage: a plugin can report cluster/mirror health
• storage: many updates to SMAPIv3
• storage: generate an alert when a cluster/mirror is degraded
• storage: add rawhba and lvmofcoe to the whitelist
• fix sm-cli mirror-list

Lots of updates

• add originator for login_with_password
• new API: VM.import
• new CLI: VM import from URL
• initial support for thin provisioning on block storage
• lots of VGPU improvements
• allow storage motion of halted VMs
• support for TLS 1.2
• initial support for FCoE
• preliminary support for SMAPIv3
• preliminary support for multiple cluster stacks
• new CLI support for reading database dumps

Lots of updates

• fix release_version of get_SRs_required_for_recover
• support SM backend-kind override via VDI.other_config key
• support floppy disk drives
• when performing a snapshot, set is_a_snapshot
• update API version to 2.4
• don't double-count HA-protected VMs when restarting them
• don't create refs for snapshots that don't exist on import
• expose RDP state, via guest agents, via VM guest metrics
• read all paths from the config file
• use 'ip' rather than 'ifconfig'
• block the pool-join if the joining host has a network bond
• use local force_state_reset after cross-pool SMX
• correct error text for assert_no_shared_srs_on_me
• allow ISO VBDs to be made from any SR
• disallow resume while a checkpoint is ongoing
• don't pause tapdisk
• use oclock rather than Unix.time
• import_raw_vdi: pass content-length to vhd-tool
• update hostname when it changes
• allow WLB servers to have an IPv6 address
• make sure we return the task reference when cancelling a task
• python: fix compatibility with python 2.7
• add a plugin to install supplemental packs
• create a PGPU for the system display device
• allow PCI vendors to be whitelisted for GPU passthrough
• allow passthrough of vga_arbiter device when appropriate
• remove VM hooks which are now handled by xenopsd
• set the content-length and close the tar header when exporting metadata
• handle cancellation of cross-host VDI.copy
• prevent VM.revert deleting all VDIs unconditionally
• update VDI.snapshot_of links after a VM.revert
• support for read-caching
• check for enough disk space before installing hotfixes
• VM.hard_reboot cancels VM.clean_reboot

Improved debugging

• examples: wrap task.destroy with an exception handler
• add GC stats reporting
• support a "feature-suspend" flag
• fix HTTP requests with an empty cookie
• add opam file
• add documentation
• update to new backtrace API
• xe: add "--trace" option to print backtraces
• add license check for vGPU
• run migration pre-checks for VDI.pool_migrate
• tidy up the internal database interface

RRD interface change release

• Handle Rrdd_plugin interface change
• Improved Storage Motion error reporting
• Hard shutdown/reboot now override more in-progress operations
• sparse_dd has moved
• License code fixes and cleanups
• WLB code fixes and cleanups

incremental improvements

• configure: allow -warn-error to be disabled
• use SMAPIv2 VDI.stat for XenAPI VDI.update
• annotate startup tasks with extra debug information
• examples: add a streaming export/import example
• prevent the event queue from taking up too much memory

even more opam friendly

• configure script works when ocamlfind is installed via opam

Increased opam-friendliness

• re-add xenopsd plugin for xen-bugtool
• don't break when system gpg binary is upgraded
• set the right month for host crashdump records
• allow the location of the inventory file to read from xapi.conf

Much more configurable release

• revamped configuration handling and support of config file overrides
• prevent timeouts when collecting bugtools
• allow vCPU hotplug for HVM guests if feature-vcpu-hotplug is set
• improve cancellation of VM migration
• use busybox for DHCP on the host internal management network