multiple security updates
    
    xenstore watch notifications lacking permission checks [XSA-115,
    	CVE-2020-29480] (#1908091)
    Xenstore: new domains inheriting existing node permissions [XSA-322,
    	CVE-2020-29481] (#1908095)
    Xenstore: wrong path length check [XSA-323, CVE-2020-29482] (#1908096)
    Xenstore: guests can crash xenstored via watchs [XSA-324, CVE-2020-29484]
    	(#1908088)
    Xenstore: guests can disturb domain cleanup [XSA-325, CVE-2020-29483]
    	(#1908087)
    oxenstored memory leak in reset_watches [XSA-330, CVE-2020-29485]
    	(#1908000)
    undue recursion in x86 HVM context switch code [XSA-348, CVE-2020-29566]
    	(#1908085)
    oxenstored: node ownership can be changed by unprivileged clients
    	[XSA-352, CVE-2020-29486] (#1908003)
    oxenstored: permissions not checked on root node [XSA-353, CVE-2020-29479]
    	(#1908002)
    FIFO event channels control block related ordering [XSA-358,
    	CVE-2020-29570] (#1907931)
    FIFO event channels control structure ordering [XSA-359, CVE-2020-29571]
    	(#1908089)