`--sleep <ms>` doesn't work

[tyilo]

Using sslscan version 2.2.2, the --sleep flag only works when used as --sleep=<ms>, not when used as --sleep <ms>.
This is very confusing and I first thought that the sleep flag didn't work at all.

$ time sslscan --sleep 100 example.org
...
________________________________________________________
Executed in    2.55 secs      fish           external
   usr time  268.20 millis    0.00 millis  268.20 millis
   sys time   32.73 millis    1.26 millis   31.46 millis

$ time sslscan --sleep=100 example.org
...
________________________________________________________
Executed in   16.58 secs      fish           external
   usr time  271.11 millis    1.37 millis  269.74 millis
   sys time   69.31 millis    0.28 millis   69.03 millis

[rbsec]

This is the same for all the flags that take arguments (see also --xml or --timeout for instance), and has always been like this. Ultimately it was a choice by the original author, most likely due to that fact that there's no argument parsing library - it's just a load of janky string parsing in C.

It's probably not the syntax I'd have chosen if I was writing the argument parsing from scratch, but also not something that I'd consider a bug, or a priority to try and rewrite. To be frank, like many aspects of sslscan, it's an artefact a legacy C codebase, which should really be rewritten from scratch in a different language.