add config/secrets.yml to .gitignore and .hgignore (#20292)

Contributed by Benjamin Petersen.

git-svn-id: https://svn.redmine.org/redmine/trunk@14440 e93f8b46-1217-0410-a6f0-8f06a7374b81

.gitignore

@@ -6,6 +6,7 @@
 /config/configuration.yml
 /config/database.yml
 /config/email.yml
+/config/secrets.yml
 /config/initializers/session_store.rb
 /config/initializers/secret_token.rb
 /coverage

.hgignore

@@ -8,6 +8,7 @@ config/additional_environment.rb
 config/configuration.yml
 config/database.yml
 config/email.yml
+config/secrets.yml
 config/initializers/session_store.rb
 config/initializers/secret_token.rb
 coverage