+/* Compat info: nohup (GNU coreutils 6.8) does this:
+# nohup true
+nohup: ignoring input and appending output to `nohup.out'
+# nohup true 1>/dev/null
+nohup: ignoring input and redirecting stderr to stdout
+# nohup true 2>zz
+# cat zz
+nohup: ignoring input and appending output to `nohup.out'
+# nohup true 2>zz 1>/dev/null
+# cat zz
+nohup: ignoring input
+# nohup true </dev/null 1>/dev/null
+nohup: redirecting stderr to stdout
+# nohup true </dev/null 2>zz 1>/dev/null
+# cat zz
+ (nothing)
+#
+*/
+
+int nohup_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;