Binary is now 'lush', library is 'liblush.a'. Version banner shows
"Lush 0.1.0" with original Lua copyright preserved. Adds LUSH_VERSION
defines and _LUSH_VERSION global. Internal C API names, env vars, and
default paths are unchanged for upstream compatibility.
Use uname -s to select Linux vs macOS build flags instead of
hardcoding. Add -undefined dynamic_lookup for test shared libs
on macOS. Set _port=true automatically on non-Linux in ./all.
'luaD_growstack' already checks that. This commit also fixes an
internal bug in 'luaD_growstack': a large 'n' could cause an arithmetic
overflow when computing 'needed'.
The script 'all', to run all tests, automatically ensures that the
Lua interpreter and the test C libraries (in 'testes/libs/') are
updated with any changes in 'luaconf.h'.
