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	- decoupled Digest::SHA and Digest::SHA::PurePerl
		-- scripts/tests in each module now fully independent
		-- Digest::SHA::PurePerl to be phased out eventually
			-- past versions will remain available

5.98  Wed Oct  4 00:40:02 MST 2017
	- removed "portable" mode from shasum and addfile
		-- rarely used, mostly in outdated systems
		-- potentially confusing features (e.g. \r\r\n -> \n)
		-- Universal Newlines mode (-U) a much cleaner approach
			-- mimics Universal Newlines in Python
	- shasum now uses Digest::SHA explicitly
		-- no longer loads Digest::SHA::PurePerl as an option
			-- hence no need for -R switch
		-- Digest::SHA::PurePerl has its own shasum: shasumpp

5.97  Wed Sep  6 02:23:02 MST 2017
	- added 'quiet' option to shasum
		-- thanks to Chris David for suggestion and initial patch
		-- ref. rt.cpan.org #122750
	- expanded shasum --help message
		-- to explain use of escaped FILE names

5.96  Wed Jul 27 20:04:34 MST 2016
	- prevented shasum from possibly running malicious code
		-- remove '.' from @INC before module loading
		-- ref. rt.cpan.org #116513
	- namespace cleanup (ref. rt.cpan.org #105371 and #105372)
	- minor code and documentation tweaks

5.95  Sat Jan 10 12:15:36 MST 2015
	- modified the bit-ordering test (ref. t/bitorder.t)
		-- supplied directory-change preamble for CORE builds

5.94  Sat Jan 10 00:45:28 MST 2015
	- added support for threaded builds 
		-- PERL_GET_NO_CONTEXT, pTHX_, aTHX_, etc.
		-- employed 'const' storage class where possible
		-- ref. rt.cpan.org #101260
	- simplified shabits() routine (bitwise input buffering)
		-- slightly less efficient but easier to understand
		-- ref. rt.cpan.org #101344
	- minor documentation tweaks and additions

5.93  Sun Oct 26 06:00:48 MST 2014
	- corrected alignment problem in SHA struct (src/sha.h)
		-- thanks to H. Merijn Brand and J. Hietaniemi for 
			analysis and suggested patch
	- provided workaround in t/methods.t for unreliable -T test
		-- Some Perl 5.8's mistake text for binary

5.92  Sun Jun  1 00:15:44 MST 2014
	- fixed reserved-word clash when compiling with C++
		-- use 'classname' instead of 'class'
			-- ref. SHA.xs (rt.cpan.org #96090)
	- silenced MSC compiler warning about signed/unsigned comparison
		-- ref. SHA.xs (rt.cpan.org #95830)

5.91  Fri May 16 10:21:44 MST 2014
	- restored original 'addfile' for use on opened file handles
		-- allows callbacks in place of actual files
			-- ref. IO::Callback (rt.cpan.org #95643)
	- re-established inheritance from Digest::base
		-- to pick up future Digest enhancements automatically
	- cleaned up documentation

5.90  Wed May  7 07:57:08 MST 2014
	- consolidated all dynamic memory allocation into XSUBs
		-- streamlines referencing of SHA objects
		-- simplifies DESTROYing of objects
	- enhanced Makefile.PL to allow 'use warnings'
		-- automatically reverts to $^W for early Perls
	- scrubbed C and Perl code to remove all compiler warnings

5.89  Sat Apr 19 05:14:48 MST 2014
	- added universal newlines mode ("U") to addfile and shasum
		-- based on Python Universal Newlines concept
			-- newlines identical across MacOS, DOS, and UNIX
		-- will deprecate portable mode ("p") in future
			-- "U" mode is cleaner and more efficient
	- enhanced performance
		-- reduced number of dynamic memory allocations
		-- sped up addfile method with use of C code
			-- ref. SHA.xs (_addfilebin and _addfileuniv)
	- eliminated experimental -M option in favor of new -R option
		-- reverses order of digest module preference
		-- undocumented: for test and development use only
	- sealed memory leak in SHA.xs
		-- arose only with SvPVbyte exceptions during eval
	- patched inheritence bug (ref: rt.cpan.org #94830)
		-- use sv_isobject/sv_derived_from instead of sv_isa
	- added 'allocated' flag to SHA structure (ref. src/sha.h)
		-- to guard against Perl double frees

5.88  Mon Mar 17 08:46:10 MST 2014
	- added OUTPUT clause in SHA.xs to silence compiler warning
		-- ref. shaclose()
	- changed text file test (-T) to act on filehandles
		-- ref. addfile portable mode
		-- improves consistency when reading from STDIN
		-- still must act on filenames for early Perls (< 5.6)
	- added -M and -V options to shasum
		-- undocumented: for development and testing use only

5.87  Mon Feb 17 16:42:02 MST 2014
	- simplified capture of intermediate SHA states
		-- can now be done via strings (ref. getstate/putstate)
		-- substantially reduces size of src/sha.c
	- tightened code in SHA.xs
		-- added sv_isa checks when invoking methods

5.86  Thu Jan 30 08:24:28 MST 2014
	- improved the performance of hexadecimal output functions
		-- ref. 'shahex' in src/sha.c
		-- thanks to Thomas Drugeon for ideas and test script

5.85  Wed Jun 26 04:05:26 MST 2013
	- workaround for repeated calls to shaclose (ref. Bug #86295)
		-- need to explicitly reset internal pointer to NULL
			ref. shaclose() in SHA.xs
	- corrected typos in shasum script