filesize zero cases, compressed revisions

- handle all cases where not an old file exist, or when that old file is
zero size.
- When using old revision normally these files are compressed, use
uncom

filesize zero cases, compressed revisions

- handle all cases where not an old file exist, or when that old file is
zero size.
- When using old revision normally these files are compressed, use
uncompressed size.

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io_getSizeFile returns uncompressed size of given file

A bz2-file doesn't contain information about the size of its
uncompressed content. Therefore it requires reading the whole file to
obtain the f

io_getSizeFile returns uncompressed size of given file

A bz2-file doesn't contain information about the size of its
uncompressed content. Therefore it requires reading the whole file to
obtain the filesize.

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little reformat of saveWikiText

Invalidate user session cache after profile data was changed

adjusted for scrutinizer hints

adjusted tests for reflection based method export

first go at using reflection for remote export

Fixes for the FR translation

A few fixes.

obfuscate auth passwords in config. fixes #1487

we already do it for other passwords, so it makes sense to do it here as
well.

obfuscate password in config #1487

removed accidentally checked in function

this was an intermediate woriking state but got replaced by indivdual
dump skipping. forgot to remove it again

changed tests to use a data provider

this allows for each dump being run within its own test case which then
can be skipped. This is needed to skip the django test on older PHP
versions.

removed another new feature from the postgres dump

remove postgres 9.3+ feature from dump

this hopefully fixes the tests on travis

removed unnecessary travis file

test postgres on travis

added a postgres example database to the tests

add support for new Django hashing methods

New Python Django application default to PBKDF2 with SHA256 as a
password mechanism. This adds support for that mechanism in our
password hasher class. Thi

add support for new Django hashing methods

New Python Django application default to PBKDF2 with SHA256 as a
password mechanism. This adds support for that mechanism in our
password hasher class. This will be needed in the tests for the new
PDO auth plugin.

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usie a strict comparison === instead

use getNS() call instead of dirname()

#1477:Search heading still displayed although search disabled

Fix PHP7 evaluation order incompatibility

Fixes #1480

clean up the onselect callback

This makes sure the provided callback is using alphanumerics only. I'm
not sure this is needed, but better safe than sorry.

Revert "Revert "make reuse of mediamanager popup easier""

because we actually want it in this branch ;-)

This reverts commit 38a2174b1dd098290d4b853df853c1072369377d.

Revert "make reuse of mediamanager popup easier"

this was an accidental commit to master

This reverts commit f7f7fb6c2b301fc145bf78687261f89e446e89ae.