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modulemanager: Add plugin load filter that reads module metadata from source Metadata in modules is added using lines formatted as: --% key: value Where key is a valid identifier string, and value is also a string (leading and trailing whitespace are trimmed during parsing). The initial supported keys are: --% requires_core_features: feature1, feature2, ... --% conflicts_core_features: feature1, feature2. ... These 'features' map to features reported by the new core.features module. A benefit of this load-time metadata approach compared to e.g. something like module:requires()/module:conflicts() is that we can continue to look in module search paths for a suitable module. Aborting an already-loaded module due to a version conflict would be too late.

local record lib
	enum signal
		"SIGABRT"
		"SIGALRM"
		"SIGBUS"
		"SIGCHLD"
		"SIGCLD"
		"SIGCONT"
		"SIGFPE"
		"SIGHUP"
		"SIGILL"
		"SIGINT"
		"SIGIO"
		"SIGIOT"
		"SIGKILL"
		"SIGPIPE"
		"SIGPOLL"
		"SIGPROF"
		"SIGQUIT"
		"SIGSEGV"
		"SIGSTKFLT"
		"SIGSTOP"
		"SIGSYS"
		"SIGTERM"
		"SIGTRAP"
		"SIGTTIN"
		"SIGTTOU"
		"SIGURG"
		"SIGUSR1"
		"SIGUSR2"
		"SIGVTALRM"
		"SIGWINCH"
		"SIGXCPU"
		"SIGXFSZ"
	end
	signal : function (integer | signal, function, boolean) : boolean
	raise : function (integer | signal)
	kill : function (integer, integer | signal)
	-- enum : integer
end
return lib