fix function name media_isexternal()
remove empty rev from ml()
rename getProperRevision() to getLastRevisionAt()
make getLastRevisionAt() a method of ChangeLog
add test getlastrevisionat
localize msg
restore old version of pageinfo()
rename function _getProperMediaRevision to _getLastMediaRevisionAt
reduce a bit duplicated code
add test for empty rev in ml() and wl()
Improve changelog reading. Inclusive unittests for chunks smaller than changelog lines.
bugfix and reformatting changelog. small chunck unittests
Merge pull request #433 from dokuwiki-translate/lang_update_499

Translation update (ja)
Prepare an XMLRPC logoff method. Rationale: XMLRPC is thought for
script, which typically should not store their authentication cookies on
disk. However: 1st: DW cannot tell if an external script is in this
respect well-behaved. 2nd: it does not hurt to provide means for a
voluntary log-out.

There are, BTW, two parts of authentication data: one is stored in the
cookie-storage of the client, and the other part is stored in the
session data of the DW instance on the server. This logoff call is
responsible for invalidating the credentials stored on the server,
regardless of any cookie data remaining (or being stolen) on the client
side.
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translation update
Merge pull request #438 from dokuwiki-translate/lang_update_502

Translation update (ko)
Merge pull request #439 from dokuwiki-translate/lang_update_503

Translation update (fi)
Increase also the API version.
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