CLSA-2022-1646915699 Fix CVE(s): CVE-2022-0729, CVE-2022-0572, CVE-2022-0685, CVE-2022-0554

SECURITY UPDATE: May end up with no current buffer - debian/patches/CVE-2022-0554.patch: When deleting the current buffer to not pick a quickfix buffer as the new current buffer - CVE-2022-0554 SECURITY UPDATE: Crash when repeatedly using :retab - debian/patches/CVE-2022-0572.patch: Bail out when...

Fix of CVE: CVE-2022-0554, CVE-2022-0729, CVE-2022-0685, CVE-2022-0572

CVE-2022-0554: fix ending up with no current buffer - CVE-2022-0572: fix crashing when repeatedly using :retab - CVE-2022-0685: fix crashing when using special multi-byte character - CVE-2022-0729: fix crashing with specific regexp pattern and string...