more branding fixes

src/requestdialog.ui

@@ -216,7 +216,7 @@
    <item row="0" column="2" colspan="2">
     <widget class="QLabel" name="lblHeader">
      <property name="text">
-      <string>Request payment from a Sapling address. You'll send a ARRR 0.0001 transaction to the address with a zcash payment URI. The memo will be included in the transaction when the address pays you.</string>
+      <string>Request payment from a Sapling address. You'll send a ARRR 0.0001 transaction to the address with a Pirate payment URI. The memo will be included in the transaction when the address pays you.</string>
      </property>
      <property name="wordWrap">
       <bool>true</bool>

src/settings.cpp

@@ -297,7 +297,7 @@ PaymentURI Settings::parseURI(QString uri) {
     PaymentURI ans;
 
     if (!uri.startsWith("zcash:")) {
-        ans.error = "Not a zcash payment URI";
+        ans.error = "Not a Pirate payment URI";
         return ans;
     }