This version incudes the following bugfix: - An un-initialized field in the configless code path leads to a crash on the first request. and the relative regression test

An un-initialized field in the configless code path leads to a crash on the first request.

This version includes two bugfixes: - use ${MAKE} to recursively call make - fix the misleading example in the man page: macros name may not be reserved words Both bugs found and fixed by Anna “CyberTailor”, thanks!

> Macros names may not be reserved words

https://www.gnu.org/software/make/manual/html_node/Error-Messages.html

some [ implementation will warn about "bad number"

it's used only to parse the -p flag. While there add check_port_num to check the range for the port.

it causes a cascade of warnings on some architectures. Also, for what we're doing here, the signed/unsigned property isn't important.