maint: Add 'berlin.guixsd.org.pub'.

* bayfront.guixsd.org.pub: Rename to...
* berlin.guixsd.org.pub: ... this.
* Makefile.am (dist_pkgdata_DATA): Adjust accordingly.
* gnu/services/base.scm (%default-authorized-guix-keys): Likewise.

Makefile.am

@@ -416,7 +416,7 @@ check-system: $(GOBJECTS) $(BOOTSTRAP_GUILE_TARBALLS)
 # Public key used to sign substitutes from hydra.gnu.org & co.
 dist_pkgdata_DATA =				\
   hydra.gnu.org.pub				\
-  bayfront.guixsd.org.pub
+  berlin.guixsd.org.pub
 
 # Bash completion file.
 dist_bashcompletion_DATA = etc/completion/bash/guix

gnu/services/base.scm

@@ -1345,7 +1345,7 @@ failed to register hydra.gnu.org public key: ~a~%" status))))))))
 (define %default-authorized-guix-keys
   ;; List of authorized substitute keys.
   (list (file-append guix "/share/guix/hydra.gnu.org.pub")
-        (file-append guix "/share/guix/bayfront.guixsd.org.pub")))
+        (file-append guix "/share/guix/berlin.guixsd.org.pub")))
 
 (define-record-type* <guix-configuration>
   guix-configuration make-guix-configuration