add tests: URL's with non-ascii names....

[petersilva]

Want some tests that will prevent regressions on:

• sr3 HTTPS polling issue, doesn't happen on v2 sarracenia#884

• a few file names with UTF-8 accented characters in them.

• others with + in them (case from 884)

• perhaps a colon or two.

encodings to worry about:

• url-encoding
• character encodings (utf8 vs. iso8859-1 vs. ascii)