`ioctl` and `ioctlsocket` take two different types of arguments but worked in the past due to
long being 32-bit. However, ioctl functionality is non-standard and should not be used in
code written after **1997** in order to make sockets non-blocking. This functionality was
standardized as part of fcntl.
* Using the new function `make_nonblocking` to make socket nonblocking
Join the license header with historical comments using a separator so IDEs can correctly parse the initial header.
Also use .gitattributes to ensure all files are LF.
