+- Email::Address::XS deb: libemail-address-xs-perl
+ pkg: pkg-Email-Address-XS
+ (correct parsing of tricky email
+ addresses, phrases and comments,
+ required for IMAP)
+
+- Parse::RecDescent deb: libparse-recdescent-perl
+ pkg: p5-Parse-RecDescent
+ rpm: perl-ParseRecDescent
+ (optional, for public-inbox-imapd(1))
+
+- BSD::Resource deb: libbsd-resource-perl
+ pkg: p5-BSD-Resource
+ rpm: perl-BSD-Resource
+ (optional, for PSGI limiters
+ see public-inbox-config(5))
+