are enabled by default on DOS and Windows, but can be turned off by
editing your makefile and removing -DCLUA_BINDINGS from the compiler
flags.

are enabled by default, but can be turned off by removing
-DCLUA_BINDINGS from your makefile.

User scripts are not enabled by default on Unix since the stock
makefile installs Crawl setgid, and the Lua scripting interface has
not been audited for setgid security. See the full section on Lua for
more details. For non-privileged installs, you can enable Lua user
scripts as described in the build instructions.

If you're playing Crawl on a remote machine, the character encoding
needs to be UTF-8 on the server, *and* your local terminal (where
you're running telnet/ssh) needs to be able to decode UTF-8.

If you're playing Crawl on a remote machine, the remote Crawl should
be built with Unicode support, *and* your local terminal (where you're
running telnet/ssh) needs to be able to decode UTF-8.