library: more strdup() calls are now simple assignment

In the commits referenced below many strdup calls were
eliminated in favor of a simple assignment to a string
pointer. With this patch the remaining calls are gone.

Reference(s):
. Aug, 2025 - more strdup calls eliminated
commit 14800862
. Aug, 2025 - some strdup calls eliminated
commit a5708118

Signed-off-by: Jim Warner <james.warner@comcast.net>