Various: Fix typos `unkown', `retreive' (detected by lintian)

Signed-off-by: Ian Jackson <ian.jackson@citrix.com>
Gbp-Pq: Name 0003-Various-Fix-typos-unkown-retreive-detected-by-lintia.patch

tools/xentrace/xenalyze: Fix typos detected by lintian

Signed-off-by: Ian Jackson <ian.jackson@citrix.com>
Gbp-Pq: Name 0002-tools-xentrace-xenalyze-Fix-typos-detected-by-lintia.patch

docs/man: Fix two typos detected by the Debian lintian tool

Signed-off-by: Ian Jackson <ian.jackson@citrix.com>
Gbp-Pq: Name 0001-docs-man-Fix-two-typos-detected-by-the-Debian-lintia.patch

xen (4.11.4+57-g41a822c392-1) buster-security; urgency=high

  * Update to new upstream version 4.11.4+57-g41a822c392, which also contains
    security fixes for the following issues:
    - x86: Race condition in Xen mapping code
      XSA-345 (CVE-2020-27672)
    - undue deferral of IOMMU TLB flushes
      XSA-346 (CVE-2020-27671)
    - unsafe AMD IOMMU page table updates
      XSA-347 (CVE-2020-27670)
    - x86 PV guest INVLPG-like flushes may leave stale TLB entries
      XSA-286 (CVE-2020-27674)
    - Information leak via power sidechannel
      XSA-351 (CVE-2020-28368)
    - stack corruption from XSA-346 change
      XSA-355 (CVE-2020-29040)

[dgit import unpatched xen 4.11.4+57-g41a822c392-1]

Import xen_4.11.4+57-g41a822c392.orig.tar.xz

[dgit import orig xen_4.11.4+57-g41a822c392.orig.tar.xz]

Import xen_4.11.4+57-g41a822c392-1.debian.tar.xz

[dgit import tarball xen 4.11.4+57-g41a822c392-1 xen_4.11.4+57-g41a822c392-1.debian.tar.xz]