unbreak build on OpenBSD due to undeclared identifier PATH_MAX
unbreak build on OpenBSD due to undeclared identifier PATH_MAX

in version 5.3.0, there was a PATH_MAX defined for APPLE and OpenBSD
set to 255.
Re-add PATH_MAX define for OpenBSD, as it is defined in sys/syslimits.h
set to 1024

RealEnder/hcxtools,ZerBea/hcxtools,ZerBea/hcxtools,ZerBea/hcxtools,RealEnder/hcxtools,RealEnder/hcxtools