changing default handling of line graphics mode

[Mike Frysinger]

currently ncurses treats terminals that don't support line drawing
modes as the degenerate case.  but with the world moving to UTF-8
everywhere as the normal, can't we can flip this logic on its head?
specifically, if we detect that the current encoding supports UTF-8,
we simply use standard Unicode codepoints.

terminals like mosh only run in UTF-8, and some are starting to
support DOCS to transition to a UTF-8-only mode on the fly:
        https://www.cl.cam.ac.uk/~mgk25/unicode.html#term
-mike

--- a/ncurses/tinfo/lib_setup.c
+++ b/ncurses/tinfo/lib_setup.c
@@ -611,8 +611,10 @@ _nc_locale_breaks_acs(TERMINAL *termp)
                CONTROL_O(set_attributes)) {
                result = 1;
            }
-       }
-    }
+       } else if (_nc_unicode_locale())
+           result = 1;
+    } else if (_nc_unicode_locale())
+       result = 1;
     returnCode(result);
 }

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