As mentioned in #74 , the GC_LISTING packet returns lot of duplicated NewGRF entries.

With new system, I would expect there will be entires like this:
ID NEWGRF_ID NEWGRF_MD5 NEWGRF NAME

once for every unique combination. The ID is used in ServerInfo part to assign NewGRF to server.

What is observed is many duplicated combinations of the NEWGRF_ID NEWGRF_MD5 NEWGRF NAME, but with different ID.
Which is kind of redundant.

Seems like game controller does not properly check if the NewGRF already exists in the list.

At this moment there is ~6000 entries in the packet, while only ~1500 is actually unique, meaning 4500 entries are redundant.

Example of decoded GRF part from GC_LISTING packet

(removed attachment as it contains information we are not free to distribute)