[qub] gzip "should" work again

[stephan b. <st...@wa...>]

i just re-added some gzip support to SerialTree-qxml.cpp, using gzread() =
and=20
gzwrite() (from zlib). i'm certain that my size estimate for the read buf=
fer=20
is way, way off (i do filesize * 100), but there's a cerr message showing=
=20
actual vs planned so we can narrow that number down. The danger of * 100 =
is=20
if we read an uncompressed, large gcom - easily 200MB would get allocated=
,=20
which obviously isn't okay. :/

Anyway, it "appears to work okay."

--=20
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