Eliminate Max Simultaneous Transfers limit of 10

[danielsuarez369]

Hello there.

This is a duplicate of #5062 however it is a decade old, and as stated in that ticket 10 months ago modern 21st century compute & network technology can easily handle hundreds of concurrent SFTP/FTP sessions, no reason keeping limit.

When dealing with thousands of small files, and scenarios where there is a speed limit per transfer, that 10 transfer limit is a severe bottleneck, and an unnecessary one.