Description:
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ZipArchive::extractTo will truncate any path segment which ends in a period. For instance, if I create a zip file and add the file `path/to./file.txt` and then extract that file, it will be extracted to `path//file.txt` instead of in the actual expected path.

See the gist provided for a sample script which demonstrates the problem.

Test script:
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https://gist.github.com/opengeek/483d830bf35b60a2ef22

Expected result:
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/usr/local/bin/php /Users/opengeek/repos/test/test-zip.php
Opened archive test-archive.zip successfully
test/test.txt
test./test.txt
.test/test.txt

Process finished with exit code 0

Actual result:
--------------
/usr/local/bin/php /Users/opengeek/repos/test/test-zip.php
Opened archive test-archive.zip successfully
test/test.txt
test./test.txt
.test/test.txt
Extract failure: expected file extracted to test-extract/test./text.txt

Process finished with exit code 0