Initial data commit

Task/Fork/Peri/fork.peri

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+###sysinclude standard.uh
+###sysinclude system.uh
+#g
+."Start!\n"
+§child fork sto childpid
+@childpid wait
+@childpid ."This was the child pid: " printnl
+end
+child: ."I am the child!\n"
+#d 3.14 printnl
+2 sleep
+end
+{ „childpid” }