[PATCH] reduce frequency of UNIVERSAL->import warnings

Jesse and I talked about the 5.11.0-introduce behavior that warned when
importing UNIVERSAL.  I'd hoped to stronly discourage ever loading UNIVERSAL.pm
because it alters certain global behaviors with no benefit.  He felt the
warning was too obnoxious for the case of "use UNIVERSAL;" so now the warning
is issued only when a symbol has been requested for import.

Patch attached.

-- 
rjbs

• [PATCH] reduce frequency of UNIVERSAL->import warnings by Ricardo Signes
• Re: [PATCH] reduce frequency of UNIVERSAL->import warnings by Rafael Garcia-Suarez