Fix confusion regarding deprecated modules.

Fix confusion regarding deprecated modules.

* modules/calloc (Status, Notice): Mark module as deprecated, not
obsolete.
* modules/fnmatch-posix (Status, Notice): Likewise.
* modules/getdate (Status, Notice): Likewise.
* modules/getopt (Status, Notice): Likewise.
* modules/malloc (Status, Notice): Likewise.
* modules/pipe (Status, Notice): Likewise.
* modules/realloc (Status, Notice): Likewise.
* modules/rename-dest-slash (Status, Notice): Likewise.
* modules/unictype/bidicategory-all (Status, Notice): Likewise.
* modules/unictype/bidicategory-byname (Status, Notice): Likewise.
* modules/unictype/bidicategory-name (Status, Notice): Likewise.
* modules/unictype/bidicategory-of (Status, Notice): Likewise.
* modules/unictype/bidicategory-test (Status, Notice): Likewise.