update to version 20040517, which parses 10alpha3 as 10.a3.
Special strings parsed that way are pl, alpha, beta, pre and rc.

Affected ports:

• databases/sybtcl sybtcl-3.0rc2
• graphics/linux-bmrt linux-bmrt-2.6beta
• net/py-ldap2 py23-ldap2-2.0.0pre21