Cross-platform raise open file descriptors limit
Applicable for OSX and Linux
on Windows does nothing
add in Cargo.toml:
[dependencies]
fdlimit = "0.2.1"
fdlimit is distributed under the terms of the Apache License (Version 2.0).
See LICENSE for details.
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in fdlimit by you, as defined in the Apache-2.0 license, shall be
licensed as above, without any additional terms or conditions.