test-serve: fix test for binding to low named port on solaris
Solaris do not know the service called http, so we use echo instead.
Trying to define KILLQUIETLY when running the hgserve function didn't set the
value within the function. Now we set the variable before calling the function.
% Without -v
access log created - .hg/hgrc respected
% errors
% With -v
listening at http://localhost/ (bound to 127.0.0.1:HGPORT1)
% errors
% With -v and -p HGPORT2
listening at http://localhost/ (bound to 127.0.0.1:HGPORT2)
% errors
% With -v and -p echo (should fail because low port)
abort: cannot start server at 'localhost:7': Permission denied
abort: child process failed to start
% errors
% With --prefix foo
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors
% With --prefix /foo
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors
% With --prefix foo/
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors
% With --prefix /foo/
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors