>>201
You need to patch the file http-syntax.scm (and recompile mit-scheme). To quote the repo:
The file runtime/http-syntax.scm follows the RFC 2616 which requires that the value of the Location header be an absolute URI. The standard has been replaced (see RFC 7231 section 7.1.2.) and a relative URI is now allowed.
Recoding the redirection after posting would mean SchemeBBS not being domain agnostic. I know patching makes the install cumbersome, I'll try to get both patches incorporated in MIT Scheme 10, http-syntax and httpio (now http-io) because those two libraries have bugs and haven't changed (I just checked).
If you don't want to recompile MIT Scheme, there's a pre-compiled binary for x86_64 here: https://textboard.org/static/mit-scheme-9.2/
>>201-202
Assuming you have already installed MIT Scheme 9.2
curl -O http://ftp.gnu.org/gnu/mit-scheme/stable.pkg/9.2/mit-scheme-9.2.tar.gz # <- you need to fetch the MIT Scheme source, not the Unix binaries
curl -O ttps://gitlab.com/naughtybits/schemebbs/-/raw/master/mit-scheme-9.2_patches/patch-runtime_http-syntax.scm
tar xzvf mit-scheme-9.2.tar.gz
patch -p0 < patch-runtime_http-syntax.scm
cd mit-scheme-9.2/src
./configure
make
sudo make install