Cobra's generated zsh script spawns a subshell per candidate and sends
every host through _describe, so <Tab> hangs for seconds with thousands
of cached hosts. netssh now ships its own script: subcommands and flags
go through _describe, plain hostnames through compadd. 5000 hosts
complete in ~0.08 s instead of ~4 s.
Add completion.max_results to cap the number of offered hostnames and
sort host candidates for a stable order.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
