man: Document versioned Provides

debian/changelog

@@ -3,6 +3,7 @@ dpkg (1.18.0) UNRELEASED; urgency=low
   * Document arch-qualifiers for dependency fields in deb-control(5) and
     deb-src-control(5). Reported by Johannes Schauer <j.schauer@email.de>.
     Closes: #768842
+  * Document versioned Provides in deb-control(5).
 
  -- Guillem Jover <guillem@debian.org>  Tue, 09 Dec 2014 23:53:18 +0100
 

man/deb-control.5

@@ -257,7 +257,8 @@ An optional version can also be given with the same syntax as above for the
 .B Conflicts
 and
 .B Replaces
-fields.
+fields, and an optional exact (equal to) version can also be given with the
+same syntax as above for the \fBProvides\fP field (since dpkg 1.17.11).
 .
 .TP
 .BI Built\-Using: " package-list"