Returning some of my ports back to the pool

[giffunip at tutopia.com]

Hello guys;

I've been dropping some of my ports because I don't have time lately to the
proper maintainace they demand and I wouldn't like to be an obstacle for their
further development.

These ports give absolutely no trouble but I'll be dropping them too:

devel/ptmalloc
graphics/mesagl
science/silo
textproc/amberfish
textproc/es-ispell
textproc/it-ispell

Can some committer please reset the maintainer on them?

best regards,

Pedro.

ps. This is not a goodbye, time permitting I will continue providing updates to
other ports. ;-)