Heads up: LIBRARY is deprecated in manuals

Hello,

Today's mandoc update in CURRENT [0] comes with two changes for writing
library manuals:

The library macro, Lb, is now to be used in SYONPSIS for brevity, where
it renders as a C-style comment. The LIBRARY section is now deprecated
for new manuals.

The function type macro, Ft, has been overhauled, allowing for multiple
arguments. It can, but should not be quoted.

Both changes are reflected in the mdoc(7) manual and should produce no
change in existing manuals.

[0]: 4c07abdbacf4 (mandoc: Vendor import of upstream at 2025-06-13)

Best,
Alex