increase code coverage, fix minor memleak

fix default format conversion, increase code coverage

new test increases code coverage, fix memleak found by test

new test for Phar::isValidPharFilename. Fix Phar::isValidPharFilename. Fix extension detection for all cases

remove/move unreachable code

improve rewrite callback support, add test for callback that does not return string/false

new test for invalid rewrite callback

new test for webPhar with phar.extract_list

ensure freeing of cwd/name happens in all cases

re-enable disabled cwd code

remove unreachable code, add test for large non-php file

remove unreachable code

fix PATH_INFO munging, add to test case

remove unreachable code, add test for no file extension and unknown file extension with Phar::webPhar

fix Phar::mount() to also allow running externally with full phar:// path, add test

fix Phar::running()

fix discovery of files hidden in a URL - makes using any regular front controller possible

new test for custom 404 handler, fix segfault found by test

implement opendir for mounted directories - much simpler to do than I initially thought

implement symbolic link support within a tar-based phar archive
this also resulted in a major fix for mounted directories, which were recycling the 'link' field which
could cause stupid confl

implement symbolic link support within a tar-based phar archive
this also resulted in a major fix for mounted directories, which were recycling the 'link' field which
could cause stupid conflicts with actual links, so move that to new 'tmp' field.

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fix ZTS build and Phar::isValidPharFilename

COMPLETELY rework filename extension detection. Now the only requirements are:
1 - executable phars must contain '.phar' in the filename
2 - non-executable phars must not contain '.phar' and

COMPLETELY rework filename extension detection. Now the only requirements are:
1 - executable phars must contain '.phar' in the filename
2 - non-executable phars must not contain '.phar' and must have an extension of at least 1 character

In addition, phar filenames must exist if opened for read, and the directory containing the phar must exist if opened for creation
if opened for creation, the file must not already exist
[DOC]

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- Fix ZTS build

fix build if SPL is disabled

restore Phar->compress/decompress() to simplify $phar->convertToExecutable(NULL, Phar::GZ) to $phar->compress(Phar::GZ)
[DOC]