+sub http_useragent_string_map ($$) {
+ my ($caller_lib_agent, $reason_style_or_caller) = @_;
+ $caller_lib_agent =~ y/A-Za-z/N-ZA-Mn-za-m/;
+ $caller_lib_agent =~ s/\s/_/g;
+ my $version= version_core();
+ return "yarrg/$version ($reason_style_or_caller)".
+ " $caller_lib_agent".
+ " (http://yarrg.chiark.net/intro)";
+}
+
+sub http_useragent ($) {
+ my ($who) = @_;
+ my $ua= LWP::UserAgent->new;
+ my $base= $ua->_agent();
+ $ua->agent(http_useragent_string_map($base, $who));
+ return $ua;
+}
+