Filter packages already provided by MBR

And perl-Pod-Perldoc was merged into F26.

perl.yaml

@@ -22,6 +22,12 @@ data:
         community: https://fedoraproject.org/wiki/Modularity
         documentation: https://fedoraproject.org/wiki/Fedora_Packaging_Guidelines_for_Modules
         tracker: https://taiga.fedorainfracloud.org/project/modularity
+    filter:
+        rpms:
+            # This is provided by MBR, we do not need any different content
+            # there, not providing it will preserve MBR's NEVRA and that's
+            # good for dependend modules.
+            - perl-srpm-macros
     components:
         rpms:
             # We need to build all (as in perl-bootstrap) RPM packages again
@@ -31,7 +37,7 @@ data:
             # from perl-bootstrap and must be built first.
             perl-srpm-macros:
                 rationale: Control generating source packages.
-                ref: 4b86d3dcaca3b041771cdccdcba4f9d31b8f1b2d
+                ref: f81d69886e3df24ba5d766d7927583822826fa34
                 buildorder: -1
             # Then we can rebuild in a random order because we have all binary
             # packages available from perl-bootstrap.
@@ -232,7 +238,7 @@ data:
                 ref: f26
             perl-Pod-Perldoc:
                 rationale: Core Perl API.
-                ref: 842e567a333ccfd2b15be93f230d29414be0f581
+                ref: f26
             perl-Pod-Simple:
                 rationale: Core Perl API.
                 ref: f26