Log Message:
pkgtools/pkglint: update to 20.2.3

Changes since 20.2.2:

Complain about patches that add a hard-coded interpreter.  Even if that
interpreter is /bin/sh, which is available on most platforms, it is still
inappropriate on old Solaris installations.  Other popular paths start
with /usr/pkg or /usr/local, and these are not controlled by pkgsrc either.