SOLR-5539: Admin UI - Remove ability to create/modify files (merge r1548477)

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SOLR-5525

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Clean up.

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SOLR-5540: HdfsLockFactory should explicitly create the lock parent directory if necessary.

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SOLR-5533: Improve out of the box support for running Solr on hdfs with SolrCloud.

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SOLR-5532: SolrJ Content-Type validation is too strict for some webcontainers / proxies.

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TEST_VERSION_CURRENT -> next release version

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LUCENE-5357: Upgrade StandardTokenizer and UAX29URLEmailTokenizer to Unicode 6.3; update UAX29URLEmailTokenizer's recognized top level domains in URLs and Emails from the IANA Root Zone Database; add std40/StandardTokenizerImpl40 and std40/UAX29URLEmailTokenizerImpl40, for backcompat from 4.0->4.6.  (merged trunk r1548595 and r1548746)

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broken link police

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Merged revision(s) 1548870 from lucene/dev/trunk:
Better fix for the broken link using the native javadocs linking instead of HTML links: This makes the target of the link just work with compile version

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test to help verify that functions wrapping queries (or filtered by queries) are only evaluated for docs that match those queries (merge r1548955)

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LUCENE-5362: IndexReader and SegmentCoreReaders now throw AlreadyClosedException if the refCount in incremented but is less that 1.

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SOLR-5525

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SOLR-5525

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Fix RandomSimilarityProvider Math#abs can return negative value for Integer.MIN_VALUE

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LUCENE-5364: Replace hard-coded Version.LUCENE_XY that doesn't have to be hard-coded (because of back-compat testing or version dependent behavior, or demo code that should exemplify pinning versions in user code), with Version.LUCENE_CURRENT in non-test code, or with LuceneTestCase.TEST_VERSION_CURRENT in test code; upgrade hard-coded Version.LUCENE_XY constants that should track the next release version to the next release version if they aren't already there, and put a token near them so that they can be found and upgraded when the next release version changes: ':Post-Release-Update-Version.LUCENE_XY:' (merge trunk r1549701)

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SOLR-5308: Handle route keys with bit separators. Route docs to target shard leader directly.

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LUCENE-5360: Add support for developing in Netbeans IDE. (merged trunk r1549872)

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LUCENE-5360: In branch_4x the source level is "1.6"

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Merged revision(s) 1550110 from lucene/dev/trunk:
reenable javadocs on JDK8

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