Bug#517637: auto-generalise the search regex

[Osamu Aoki]

control: tags -1 moreinfo

Hi,

As I thought about this bug report and  https://bugs.debian.org/539780 ,
these share the same solution

  predefined string substitution applied to the watch file before any
  procerssing

I can think of @package@ @version@ @suffix@ @YYMMDD@ ... as the
candidates since no watch file uses @...@ I hope.

But before making uscan more complicated, discussion needs to be made.

Osamu