Rewrite dependencies to make package binNMU-able

debian/control

@@ -21,7 +21,7 @@ Section: net
 Package: tang
 Architecture: all
 Depends: ${misc:Depends},
-    tang-common (= ${binary:Version}),
+    tang-common (>= ${source:Version}),
 Recommends:
     curl,
 Description: network-based cryptographic binding server
@@ -34,7 +34,7 @@ Architecture: all
 Depends: ${misc:Depends},
     adduser,
     moreutils,
-    tang-common (= ${binary:Version}),
+    tang-common (>= ${source:Version}),
     xinetd,
 Recommends:
     curl,