Portability

- Applied patch from Emil Sköldberg.

Replace 'test ... == ...' with 'test ... = ...',
since [quoted from pkgsrc error message]:

The "test" command, as well as the "[" command, are not required to know
the "==" operator. Only a few implementations like bash and some
versions of ksh support it.

When you run "test foo == foo" on a platform that does not support the
"==" operator, the result will be "false" instead of "true". This can
lead to unexpected behavior.

ChangeLog

@@ -6,6 +6,7 @@
    message when called without an ID.
  + Summary report bar colors can now be specified with color.summary.bar
    and color.summary.background configuration variables.
+ + The configure script is more portable (thanks to Emil Sköldberg).
 
 ------ old releases ------------------------------