Problem:    Strftime() test fails on MS-Windows.
Solution:   Skip the check for using the $TZ environment variable.

Problem:    Localtime_r() does not respond to $TZ changes.
Solution:   If $TZ changes then call tzset(). (Tom Ryder)

Problem:    New resolve() implementation causes problem for plugins.
Solution:   Only resolve a resparse point after checking it is needed. (Ken
            Takata, closes #4492)

Problem:    MS-Windows: resolve() does not resolve all components of the path.
            (David Briscoe)
Solution:   Do not bail out for a reparse point. (Yasuhiro Matsumoto,
            closes #4211, closes #4447)

Problem:    Delete() can not handle a file name that looks like a pattern.
Solution:   Use readdir() instead of appending "/*" and expanding wildcards.
            (Ken Takata, closes #4424, closes #696)

Problem:    Some eval functionality is not covered by tests.
Solution:   Add a few more test cases. (Masato Nishihata, closes #4374)

Problem:    Cannot easily get directory entry matches.
Solution:   Add the readdir() function. (Yasuhiro Matsumoto, closes #2439)

Problem:    MS-Windows: executable() fails on very long filename.
Solution:   (Ken Takata, closes #4015)

Problem:    reg_executing() is reset by calling input().
Solution:   Implement a more generic way to save and restore reg_executing.
            (Ozaki Kiichi, closes #4192)

Problem:    A getchar() call while executing a register resets the
            reg_executing() result.
Solution:   Save and restore reg_executing. (closes #406