civetweb: make SOMAXCONN user-configurable as max_connections
civetweb: make SOMAXCONN user-configurable as max_connections

Signed-off-by: Jesse Williamson <cf70f4d1052416ff34d2b50dffc34febbff945b9@canonical.com>

GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver