Document the dejagnu.h functions for the UNSUPPORTED status

ChangeLog

@@ -22,6 +22,9 @@
 	(TestState::totals): Likewise for C++ API.
 	* lib/dejagnu.exp (host_execute): Add UNSUPPORTED test result.
 	* doc/dejagnu.texi (DejaGnu unit test protocol): Document same.
+	(C unit testing API): Document new function for same.
+	(C++ unit testing API): Document new function for same.
+
 	* testsuite/libdejagnu/unit-c.c: Add test for UNSUPPORTED.
 	* testsuite/libdejagnu/unit.exp: Likewise.
 

doc/dejagnu.texi

@@ -2621,6 +2621,14 @@ to look over the results to determine what happened.
 @t{@b{unresolved}(@i{msg}, ...);}
 @end quotation
 
+@item
+@code{unsupported} prints a message for a test case that depends on a
+facility that is not available in the testing environment.
+
+@quotation
+@t{@b{unsupported}(@i{msg}, ...);}
+@end quotation
+
 @item
 @code{totals} prints out the total counts of all of the test results
 as a convenience when running the unit test program directly.  DejaGnu
@@ -2701,6 +2709,14 @@ to look over the results to determine what happened.
 @t{@b{TestState::unresolved}(@i{msg});}
 @end quotation
 
+@item
+@code{unsupported} prints a message for a test case that depends on a
+facility that is not available in the testing environment.
+
+@quotation
+@t{@b{unsupported}(@i{msg}, ...);}
+@end quotation
+
 @item
 @code{totals} prints out the total counts of all of the test results
 as a convenience when running the unit test program directly.  DejaGnu