-D now means --daily, not --deviation

Because --daily is more commonly desired, and fits the pattern of the
other periodic switches:

  -D  --daily
  -W  --weekly
  -M  --monthly
  -Y  --yearly

Only --quarterly doesn't have its own short option.

src/report.cc

@@ -446,7 +446,7 @@ option_t<report_t> * report_t::lookup_option(const char * p)
     OPT_CH(cleared);
     break;
   case 'D':
-    OPT_CH(deviation);
+    OPT_CH(daily);
     break;
   case 'E':
     OPT_CH(empty);

src/report.h

@@ -451,7 +451,7 @@ public:
       parent->HANDLER(limit_).on(string("--current"), "date<=today");
     });
 
-  OPTION_(report_t, daily, DO() {
+  OPTION_(report_t, daily, DO() { // -D
       parent->HANDLER(period_).on(string("--daily"), "daily");
     });
 
@@ -464,7 +464,7 @@ public:
 				   string("depth<=") + args.get<string>(1));
     });
 
-  OPTION_(report_t, deviation, DO() { // -D
+  OPTION_(report_t, deviation, DO() {
       parent->HANDLER(display_total_)
 	.set_expr(string("--deviation"), "amount_expr-total_expr/count");
     });