This changes how libpcap is loaded. Instead of statically linking
during compile time, it will now be loaded dynamically during runtime.
The only advantage of this is that getting "libpcap-dev" is no longer
a dependency. All you need is to get a C compiler, but otherwise, the
project is dependency free -- in order to build it.
To run it, you still need libpcap.so installed, but this is the default for
all major Linux distros, OpenBSD, FreeBSD, and macOS.