Import LinuxCNC source tree

tests/halcompile/userspace-count-names/userspace_count_names.comp

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+component userspace_count_names;
+option userspace;
+option userinit;
+
+pin out signed out = 42;
+license "GPL";
+;;
+#include <unistd.h>
+#include <signal.h>
+#include <stdio.h>
+
+void exit_handler(int signo) {
+    ;
+}
+
+void userinit(int argc, char **argv) {
+    int i;
+    printf("count=%d\n", count);
+    for (i = 0; i < 16; i ++) {
+        if (names[i] != NULL) {
+            printf("names[%d]=%s\n", i, names[i]);
+        }
+    }
+    printf("argc=%d\n", argc);
+    for (i = 0; i <= argc; i ++) {
+        printf("argv[%d]=%s\n", i, argv[i]);
+    }
+    signal(SIGTERM, exit_handler);
+    fflush(NULL);
+}
+
+void user_mainloop(void) {
+    pause();
+}
+