Some binary packages are build from official Debian
sources but have no version in the Debian archive
(e.g. libc0.1). Fix searching the source package for
those. Rather hackish solution, needs cleanup.
debug( "find source package: source=$source", 1) if DEBUG;
my $src_data = $sources_all{"$archive $suite $source"};
+ #FIXME: should be $main_archive or similar, not hardcoded "us"
+ $src_data = $sources_all{"us $suite $source"} unless $src_data;
$page->add_src_data( $source, $src_data )
if $src_data;