mandoc: Vendor import of upstream at 2025-07-27
Groff Compat Edition -- Interesting changes:
+ italics in section/subsection headers are now also bold, like groff
+ display "LOCAL" in response to invalid section numbers, like groff
+ tbl(7) rendering has been tweaked to be more like groff
+ scaling has been improved to better render poorly generated manuals
+ display "UNTITLED" in response to invalid man(7) titles, like groff
+ improve mandocd error handling of broken pipes
+ manual footers now always show NAME(SECTION) on the right, like groff
MFC after: 3 days