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Perl 5.22 emits a deprecated message when "\C" is used in a regex. Perl 5.24 will disallow it altogether. Fix it by using [A-Z] instead of \C. [ Upstream commit ce8155f7a3d59ce868ea16d8891edda4d865e873 ] Signed-off-by: Olaf Hering <olaf@aepfle.de> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: Ian Jackson <ian.jackson@eu.citrix.com> Cc: Jan Beulich <jbeulich@suse.com> Cc: Keir Fraser <keir@xen.org> Cc: Tim Deegan <tim@xen.org> Acked-by: Ian Campbell <ian.campbell@citrix.com>