Fix various bugs reported by valgrind --tool=memcheck (#46978) (cherry picked from commit f96133826e3f70efea237b7fe6a47a45a35a6ab0) (cherry picked from commit 0374e1c3fdc13a20648d9c9de5601ad042e6044d)

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4862. [bug] The rdata flags for RRSIG was not being properly set when constructing a rdataslab. [RT #46978] (cherry picked from commit 7befb67af42a6e6088d91229ab5fcb8d64db0a3a)

4504. [security] Allow the maximum number of records in a zone to be specified. This provides a control for issues raised in CVE-2016-6170. [RT #42143] (cherry picked from commit 5f8412a4cb5ee14a0e8cddd4107854b40ee3291e)

4401. [misc] Change LICENSE to MPL 2.0.

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4079. [func] Preserve the case of the ownername of records to the RRset level. [RT #37442]

4010. [cleanup] Clear the prefetchable state when initiating a prefetch. [RT #37399]

3853. [cleanup] Refactor dns_rdataslab_fromrdataset to seperate out the handling of a rdataset with no records. [RT #35968]

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[master] replace memcpy() with memmove(). 3698. [cleanup] Replaced all uses of memcpy() with memmove(). [RT #35120]

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3681. [port] Update the Windows build system to support feature selection and WIN64 builds. This is a work in progress. [RT #34160]

3364. [security] Named could die on specially crafted record. [RT #30416]

3321. [security] dns_rdataslab_fromrdataset could produce bad rdataslabs. [RT #29644]

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set $Id$

update slabbed data layout description

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3013. [bug] The DNS64 ttl was not always being set as expected. [RT #23034]

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2852. [bug] Handle broken DNSSEC trust chains better. [RT #15619]

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spelling

2448. [func] Add NSEC3 support. [RT #15452]

Make "rrset-order fixed" a compile-time option. settable by "./configure --enable-fixed-rrset". Disabled by default. [rt17977]

2349. [func] Provide incremental re-signing support for secure dynamic zones. [RT #1091] back out incorrect branch rt1091 and apply correct branch rt1091a.

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2349. [func] Provide incremental re-signing support for secure dynamic zones. [RT #1091]

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2162. [func] Allow "rrset-order fixed" to be disabled at compile time. [RT #16665] : ----------------------------------------------------------------------

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1999. [func] Implement "rrset-order fixed". [RT #13662]

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1851. [doc] Doxygen comment markup. [RT #11398]

1526. [func] Implemented "additional section caching (or acache)", an internal cache framework for additional section content to improve response performance. Several configuration options were provided to control the behavior.

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