Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* KVM startup speedup (Chao Peng)
* configure fixes and cleanups (David, Thomas)
* ctags fix (Sergey)
* NBD cleanups (Peter, Eric)
* "-L help" command line option (Richard)
* More esp.c bugfixes (me, Prasad)
* KVM_CAP_MAX_VCPU_ID support (Greg)

# gpg: Signature made Thu 16 Jun 2016 17:39:10 BST
# gpg:                using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (29 commits)
  vl: smp_parse: cleanups
  scsi: esp: make cmdbuf big enough for maximum CDB size
  scsi: esp: clean up handle_ti/esp_do_dma if s->do_cmd
  scsi: esp: respect FIFO invariant after message phase
  scsi: esp: check buffer length before reading scsi command
  nbd: Avoid magic number for NBD max name size
  nbd: Detect servers that send unexpected error values
  nbd: Clean up ioctl handling of qemu-nbd -c
  nbd: Group all Linux-specific ioctl code in one place
  nbd: Reject unknown request flags
  nbd: Improve server handling of bogus commands
  nbd: Quit server after any write error
  nbd: More debug typo fixes, use correct formats
  nbd: Use BDRV_REQ_FUA for better FUA where supported
  vl.c: Add '-L help' which lists data dirs.
  KVM: use KVM_CAP_MAX_VCPU_ID
  scsi-disk: Use (unsigned long) typecasts when using "%lu" format string
  target-i386: kvm: cache KVM_GET_SUPPORTED_CPUID data
  nbd: simplify the nbd_request and nbd_reply structs
  nbd: Don't use cpu_to_*w() functions
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>