CLI: Corrected list of keywords

src/CLI.cpp

@@ -407,9 +407,12 @@ void CLI::identifyFilter ()
     else if (raw == "from"   ||
              raw == "since"  ||
              raw == "to"     ||
+             raw == "for"    ||
              raw == "until"  ||
              raw == "-"      ||
-             raw == "for")
+             raw == "before" ||
+             raw == "after"  ||
+             raw == "ago")
     {
       a.tag ("FILTER");
       a.tag ("KEYWORD");

src/data.cpp

@@ -90,6 +90,9 @@ Interval getFilter (const CLI& cli)
       }
       else if (arg.hasTag ("KEYWORD"))
       {
+        // Note: that KEYWORDS are not entities (why not?) and there is a list
+        //       in CLI.cpp of them that must be maintained and synced with this
+        //       function.
         args.push_back (raw);
       }
       else