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The three functions has been modeled after the arc4random family of
functions, and they will always return random bytes.

The isc_random family of functions internally use these CSPRNG (if available):

1. getrandom() libc call (might be available on Linux and Solaris)
2. SYS_getrandom syscall (might be available on Linux, detected at runtime)
3. arc4random(), arc4random_buf() and arc4random_uniform() (available on BSDs and Mac OS X)
4. crypto library function:
4a. RAND_bytes in case OpenSSL
4b. pkcs_C_GenerateRandom() in case PKCS#11 library

Replace dns_fixedname_init() calls followed by dns_fixedname_name()
calls with calls to dns_fixedname_initname() where it is possible
without affecting current behavior and/or performance.

This patch was mostly prepared using Coccinelle and the following
semantic patch:

    @@
    expression fixedname, name;
    @@
    -	dns_fixedname_init(&fixedname);
    	...
    -	name = dns_fixedname_name(&fixedname);
    +	name = dns_fixedname_initname(&fixedname);

The resulting set of changes was then manually reviewed to exclude false
positives and apply minor tweaks.

It is likely that more occurrences of this pattern can be refactored in
an identical way.  This commit only takes care of the low-hanging fruit.

libdns refactoring: get rid of multiple versions of dns_dnssec_findmatchingkeys and dns_dnssec_findzonekeys

4868.	[func]		dnssec-keygen can no longer generate HMAC keys.
			Use tsig-keygen instead. [RT #46404]

4757.   [func]          New "dnssec-cds" command creates a new parent DS
                        RRset based on CDS or CDNSKEY RRsets found in
                        a child zone, and generates either a dsset file
                        or stream of nsupdate commands to update the
                        parent. Thanks to Tony Finch. [RT #46090]

4724.	[func]		By default, BIND now uses the random number
			functions provided by the crypto library (i.e.,
			OpenSSL or a PKCS#11 provider) as a source of
			randomness rather than /dev/random.  This is
			suitable for virtual machine environments
			which have limited entropy pools and lack
			hardware random number generators.

			This can be overridden by specifying another
			entropy source via the "random-device" option
			in named.conf, or via the -r command line option;
			however, for functions requiring full cryptographic
			strength, such as DNSSEC key generation, this
			cannot be overridden. In particular, the -r
			command line option no longer has any effect on
			dnssec-keygen.

			This can be disabled by building with
			"configure --disable-crypto-rand".
			[RT #31459] [RT #46047]

                        a existing TSIG key. [RT #42195]

                        CDNSKEY rrsets to named and dnssec-signzone.
                        [RT #40424]

4039.	[cleanup]	Cleaned up warnings from gcc -Wshadow. [RT #37381]

Squashed commit of the following:

commit 95effe9b2582a7eb878ccb8cb9ef51dfc5bbfde7
Author: Evan Hunt <each@isc.org>
Date:   Tue Jun 10 16:52:45 2014 -0700

    [rt10686] move version() to dnssectool.c

commit df205b541d1572ea5306a5f671af8b54b9c5c770
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:38:31 2014 +0530

    Rearrange order of cases

commit cfd30893f2540bf9d607e1fd37545ea7b441e0d0
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:38:08 2014 +0530

    Add version printer to dnssec-verify

commit a625ea338c74ab5e21634033ef87f170ba37fdbe
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:32:19 2014 +0530

    Add version printer to dnssec-signzone

commit d91e1c0f0697b3304ffa46fccc66af65591040d9
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:26:01 2014 +0530

    Add version printer to dnssec-settime

commit 46fc8775da3e13725c31d13e090b406d69b8694f
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:25:48 2014 +0530

    Fix docbook

commit 8123d2efbd84cdfcbc70403aa9bb27b96921bab2
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:20:17 2014 +0530

    Add version printer to dnssec-revoke

commit d0916420317d3e8c69cf1b37d2209ea2d072b913
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:17:54 2014 +0530

    Add version printer to dnssec-keygen

commit 93b0bd5ebc043298dc7d8f446ea543cb40eaecf8
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:14:11 2014 +0530

    Add version printer to dnssec-keyfromlabel

commit 07001bcd9ae2d7b09dd9e243b0ab35307290d05d
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:13:39 2014 +0530

    Update usage help output, docbook

commit 85cdd702f41c96fbc767fc689d1ed97fe1f3a926
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:07:18 2014 +0530

    Add version printer to dnssec-importkey

commit 9274fc61e38205aad561edf445940b4e73d788dc
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:01:53 2014 +0530

    Add version printer to dnssec-dsfromkey

commit bf4605ea2d7282e751fd73489627cc8a99f45a90
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 20:49:22 2014 +0530

    Add -V to nsupdate usage output

3735.	[cleanup]	Merged the libiscpk11 library into libisc
			to simplify dependencies. [RT #35205]

3730.	[cleanup]	Added "never" as a synonym for "none" when
			configuring key event dates in the dnssec tools.
			[RT #35277]

3729.	[bug]		dnssec-kegeyn could set the publication date
			incorrectly when only the activation date was
			specified on the command line. [RT #35278]

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

                        removed.  [RT #32178]

    - check for NSEC3 in empty nodes when not due to optout delegations
    - fixed typo in output ("Bad record NSEC record")
    - incidentally fixed an error in signzone that caused an
      incorrect warning about missing DNSKEYs when using -S
      and -3 together

3473.	[bug]		dnssec-signzone/verify could incorrectly report
			an error condition due to an empty node above an
			opt-out delegation lacking an NSEC3. [RT #32072]

                        to ensure correctness of signatures and of NSEC/NSEC3
                        chains. [RT #23673]

                        [RT #24711]

			creating key files if there is a chance that the new
			key ID will collide with an existing one after
			either of the keys has been revoked.  (To override
			this in the case of dnssec-keyfromlabel, use the -y
			option.  dnssec-keygen will simply create a
			different, noncolliding key, so an override is
			not necessary.) [RT #20838]

			will now ignore unrecognized fields when the
			minor version number of the private key format
			has been increased.  It will reject any key with
			the major version number increased. [RT #20310]