Yea, I agree. One [updated] constant seems cleaner.
LDAP_CONTROL_PROXYAUTHENTICATION (2.16.840.1.113730.3.4.18)
Perldoc'ing the OID change in Net::LDAP::Control::ProxyAuth.pm and spotlighting the change in the "Changes" file should mitigate the pain.
Of course, this is easy for me to say. I'm not on the receiving end of the mailing list. :-)
Patches welcome :-)
Graham.