tests: Add tests for new --help

This commit is a part of "--help me if you can"

Closes #5680

tests/data/test1463

@@ -0,0 +1,44 @@
+<testcase>
+<info>
+<keywords>
+FILE
+--help
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+none
+</server>
+<features>
+file
+</features>
+ <name>
+curl file category --help
+ </name>
+ <command>
+--help file
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<errorcode>
+0
+</errorcode>
+<stdout mode="text">
+Usage: curl [options...] <url>
+file: FILE protocol options
+ -I, --head          Show document info only
+ -r, --range <range> Retrieve only the bytes within RANGE
+</stdout>
+</verify>
+</testcase>