[v9_11] fix tcp client memory leak 4459. [bug] TCP client objects created to handle pipeline queries were not cleaned up correctly, causing uncontrolled memory growth. [RT #43106] (cherry picked from commit a26a62cef2adba0520c5955d740fc75fa7f2c7f5)

4434. [protocol] Return EDNS EXPIRE option for master zones in addition to slave zones. [RT #43008] (cherry picked from commit bf2238b064ed2398a9e9db27c6fb73f58c4db38a)

4401. [misc] Change LICENSE to MPL 2.0.

do not overflow exit status. [RT #42643]

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4341. [bug] 'rndc flushtree' could fail to clean the tree if there wasn't a node at the specified name. [RT #41846]

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3750. [experimental] Partially implement EDNS EXPIRE option as described in draft-andrews-dnsext-expire-00. Retrivial of remaining time to expiry from slave zones is supported. EXPIRE uses an experimental option code (65002) and is subject to change. [RT #35416]

adjust sync point

3667. [func] dig: add support to keep the TCP socket open between successive queries (+[no]keepopen). [RT #34918]

3645. [protocol] Use case sensitive compression when responding to queries. [RT #34737]

[master] use egrep as solaris doesn't like grep -E

[master] "flushtree -all" no longer optional Updated CHANGES note: 3606. [func] "rndc flushtree" now flushes matching records in the address database and bad cache as well as the DNS cache. (Previously only the DNS cache was flushed.) [RT #33970]

[master] "rndc flushtree -all <name>" 3606. [func] "rndc flushtree -all" flushes matching records in the ADB and bad cache as well as the DNS cache. (Without the "-all" option, flushtree will still only flush records from the DNS cache.) [RT #33970]

Use extended regular expression as HPUX doesn't like grep -w '\(TXT\|ANY\)'

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3593. [func] Update EDNS processing to better track remote server capabilities. [RT #30655]

reverse bad copyright update

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properly redirect stderr to stdout

handle flushing of entries just before a second ticks over, speed up priming of the cache

split out subtests of 'another leaf node, with both positive and negative cache entries'

3144. [bug] dns_dbiterator_seek() could trigger an assert when used with a nonexistent database node. [RT #25358]

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3140. [func] New command "rndc flushtree <name>" clears the specified name from the server cache along with all names under it. [RT #19970]

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