+08Jun20=======================================================================
+1. Fix show/mydx (lack of) filtering bug.
+2. Add qra locator to prefix_data.pl.
+3. Add 4 digit qra square for spotted callsign if show/dxgrid is enabled.
+4. Fix general filtering bug where erroneous input causes crashing.
+03Jun20=======================================================================
+1. Make sure that all possible regexes get passed across to the search engine.
+2. Fix out of order logging on sh/log queries spanning more than one month.
+3. Do not read backwards on sh/dx, reading forwards seems a 1/3 quicker.
+4. Add <ms>, <tr> and <es> shortcuts to sh/dx (e.g sh/dx <tr> on 2m).
+02Jun20=======================================================================
+1. Fix the small whoopsie in sh/dx.
+01Jun20=======================================================================
+1. Fix sh/dx iota and qra. This completes the conversion of sh/dx's limited
+ "old style" parsing to using Filter style parsing with something that
+ allows expressions include brackets ( and ) as well as the 'not' keyword.
+ NOTE: the precedence rules are the same as perl's '!', '||' and '&&'
+ operators.