SO_BINDTODEVICE is present, to prevent compiler warnings about the variable

Removed some dates/names in the comments.

Curl_write in CURLcode, to keep the picky compilers happy

more" when the previous approach. Known to work on Linux, possibly on other
platforms as well.

sure this doesn't get weird on 64bit archs.

archs, also no longer typecast pointers to ints as that is a nono on 64bit
systems.

a man page to text is found, we disable the built-in manual stuff to still
be able to build.

outside the source dir, not needing any symlinks

with anyway and thus caused picky compiler to warn.