As gcc 4.6.0 treats more warnings as errors, memcached compilation fails.
Solution took from original bug report for memcached.

Do not try to parse contents which are not XML with xml parser.

It's tested earlier in the same method.

self.getObject() is called right at the begining of this methd anyway, so
just keep & reuse it.

Instead, replace them with standard unicode "rempalcement char":
http://en.wikipedia.org/wiki/Replacement_character#Replacement_character

By Romain and Luke.

As slapos.recipe.erp5 depends on Zope2 in order to generate Zope2 aware
scripts reuse this dependency and import needed method instead of
rewriting it.

Required utils are basename, tr and uname

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