feature request: Support config max concurrency jobs

[qhsong]

I use sccache to complier my project on 16c CPU to complier a C++ project, it seems sccache limit the jobs into cpu cores;

# ps aux|grep sccache|wc -l
131

# ps aux|grep clang++|grep -v sccache|wc -l
17

Seems sccache limited concurrency task into CPU count. This behavior seems not match with ccache. So can we set an config for max concurrent number?

[qhsong]

Seems we need modify variable here:

sccache/src/jobserver.rs

Line 27 in 9513878

None => Client::new_num(num_cpus::get()),

[sylvestre]

feel free to provide a PR

[qhsong]

As a new Ruster, let me try here ...

[pomo-mondreganto]

I believe my latest PR #1993 fixes this issue

[qhsong]

I believe my latest PR #1993 fixes this issue

yes, let me close and try it