It would be interesting to include a $rawdeflate and $rawinflate identifier in the same way as $compress and $decompress, since mIRC already has zlib.
The interesting thing is the possibility of compressing and decompressing just by taking the block, without header and footer. It would open up a large possibility of manipulating compression files that use deflate and inflate.
I know it is possible for this by dll and even realizing a certain patch in mirc.exe, but it would be interesting to be natural of the language.