AntiSpam improvements: Less sensitive defaults for sound multi's and an off switch.

Polished the Spam tab a bit...
Also, slightly better errors for antispam bugs... Which Ruby neglected to take from me...

indra/newview/app_settings/settings.xml

@@ -930,6 +930,17 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+    <key>AntiSpamEnabled</key>
+    <map>
+      <key>Comment</key>
+      <string>When false, antispam, not relating to dialog blocking, will be turned off.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>0</integer>
+    </map>
     <key>AntiSpamFriendshipOffers</key>
     <map>
       <key>Comment</key>
@@ -1060,7 +1071,7 @@
         <key>Type</key>
         <string>U32</string>
         <key>Value</key>
-        <integer>20</integer>
+        <integer>100</integer>
     </map>
         <key>_NACL_AntiSpamNewlines</key>
         <map>
@@ -1082,7 +1093,7 @@
         <key>Type</key>
         <string>U32</string>
         <key>Value</key>
-        <integer>20</integer>
+        <integer>100</integer>
     </map>
     <!-- Vanilla SL settings that are now optionally Account-Specific -->
     <key>AgentChatColor</key>