deal with RFC 2047 encoded words (improved)

Changes for 1.015.0 - 2024-02-12

• Fix: Correct specials for DISPNAME mode.
• Fix: CPAN RT #116463: Remove . from @INC when loading modules dynamically.
• Fix: Suppress "Use of uninitialized value" warnings.
• CPAN RT #116465: Fix spelling error in manpage.