[plt-dev] A couple of SRFI patches, one addition to R6RS ports

Hi!

[ This is a slighly edited re-send of my mail to plt-scheme at ...:
  <http://thread.gmane.org/gmane.lisp.scheme.plt/37233> ]

Please see the headers of the attached patches for details.

- Fix for the R6RS version of SRFI-14
- Implementation of SRFI-0 and SRFI-98 (missing to date)

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Note that in the current version of the SRFI-0 patch, SRFI-98 is not
marked as available, if the SRFI-98 patch would go in, the corresponding
line should be updated. SRFI-0 might be a somewhat controversial topic;
if it is decided it's not suitable, that's fine with me.

Additionally, a hack to the R6RS ports implementation to make the
underlying mzscheme port accessible. This patch might look way larger
than it is; it just moves `collects/rnrs/io/ports-6.ss' to
`collects/r6rs/private/ports.ss' and adds `r6rs-port->port' to the
latter.

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Regards, Rotty
-- 
Andreas Rottmann -- <http://rotty.yi.org/>