Avoid Optional[Array] = undef in remoteip.conf.erb

By defaulting to an empty array and handling that the code is
simplified.

Author: ekohl

Diff for: templates/mod/remoteip.conf.epp

@@ -1,17 +1,17 @@
 <%- |
   String                                                     $header,
-  Optional[Array[Stdlib::Host]]                              $internal_proxy            = undef,
+  Array[Stdlib::Host]                                        $internal_proxy            = [],
   Optional[Stdlib::Absolutepath]                             $internal_proxy_list       = undef,
   Optional[String]                                           $proxies_header            = undef,
   Boolean                                                    $proxy_protocol            = undef,
-  Optional[Array[Stdlib::Host]]                              $proxy_protocol_exceptions = undef,
-  Optional[Array[Stdlib::IP::Address]]                       $trusted_proxy             = undef,
+  Array[Stdlib::Host]                                        $proxy_protocol_exceptions = [],
+  Array[Stdlib::IP::Address]                                 $trusted_proxy             = [],
   Optional[Stdlib::Absolutepath]                             $trusted_proxy_list        = undef,
 | -%>
 # Declare the header field which should be parsed for useragent IP addresses
 RemoteIPHeader <%= $header %>
 
-<%- if $internal_proxy { -%>
+<%- unless $internal_proxy.empty { -%>
 # Declare client intranet IP addresses trusted to present
 # the RemoteIPHeader value
 <%-   $internal_proxy.each |$proxy| { -%>
@@ -32,13 +32,11 @@ RemoteIPProxiesHeader <%= $proxies_header %>
 RemoteIPProxyProtocol On
 <%- } -%>
 
-<%- if $proxy_protocol_exceptions { -%>
-<%-   $proxy_protocol_exceptions.each |$exception| { -%>
+<%- $proxy_protocol_exceptions.each |$exception| { -%>
 RemoteIPProxyProtocolExceptions <%= $exception %>
-<%-   } -%>
 <%- } -%>
 
-<%- if $trusted_proxy { -%>
+<%- unless $trusted_proxy.empty { -%>
 # Declare client intranet IP addresses trusted to present
 # the RemoteIPHeader value
   <%- $trusted_proxy.each |$proxy| { -%>