libs/maintainers.txt: ported revision 48249 (added my email address) from trunk

[SVN r48351]

libs/maintainers.txt

@@ -24,7 +24,7 @@ conversion            Alexander Nasonov <alexander.nasonov -at- gmail.com>
 crc                   Daryle Walker <darylew -at- hotmail.com>
 date_time             Jeff Garland <jeff -at- crystalclearsoftware.com>
 disjoint_sets         Jeremy Siek <jeremy.siek -at- gmail.com>
-dynamic_bitset        Jeremy Siek <jeremy.siek -at- gmail.com>
+dynamic_bitset        Jeremy Siek <jeremy.siek -at- gmail.com>, Gennaro Prota <gennaro.prota -at- yahoo.com>
 exception             Emil Dotchevski <emil -at- revergestudios.com>
 filesystem            Beman Dawes <bdawes -at- acm.org>
 foreach               Eric Niebler <eric -at- boost-consulting.com>