* DEPENDENCIES: added perl for running NIST85
* tests/cobol85:
	* summary.pl: compute total duration and modules executed, output those to stderr at the end; close file handles
	* Makefile.am (summary.out): new target depending on summary.log
	* Makefile.am (summary.log): catch stderr of summary.pl into summary.out  file and output that on stdout
	* Makefile.am (URL_NEWCOB_Z): replaced by web archive URL

* configure.ac: require autoconf 2.70 and drop check for lex-library with noyywrap option for AC_PROG_LEX
* HACKING: document dependencies autoconf 2.70 and automake 1.16 and several smaller text updates
* Makefile.am (checkmanual-code-coverage, checkall-code-coverage): new targets removing the need to do that manually
* build_aux/ltmain.sh, m4/libtool.m4, m4/ltoptions.m4, m4/ltversion.m4

cobc:
* pplex.l, scanner.l: use noyywrap option instead of manually defining related code parts

configure.ac:
* drop COB_LI_IS_LL in favor of existing COB_32_BIT_LONG
* (cjson=local): use CJSON_CFLAGS and CJSON_LIBS also for this case, fix include not to use quotes

cobc:
* cobc.c (cobc_print_info): drop COB_LI_IS_LL in favor of existing COB_32_BIT_LONG
* typeck.c (cb_tree_list_has_numeric_ref_or_field): cleanup
* typeck.c (cb_emit_accept): always check position
* cobc.c, flag.def: make scope optional for -fdump

libcob:
* fileio.c (cob_fd_file_open) [_WIN32]: workaround for MinGW bug in locking
* common.h, common.c (cob_cleanup_thread): fix declaration
* common.c: drop includes found in coblocal.h
* common.c (cob_alloc_module): changed type and name of cob_mod_ptr
* common.h, coblocal.h: added pragma once for better supporting clangd in single-file mode
* intrinsic.c: speedup for NUMVAL related functions

cobc:
* pplex.l (cb_text_list): prevent duplicates
* cobc.c, help.c, pplex.l: add new flags to output dependencies following gcc: -M to output deps only, -MD to output deps while compiling (in .d files), -MP to output phony targets, -MG to keep missing copybooks, -MQ <target> to Makefile-quote target ; add -fcopybook-deps to output only copybook names instead of file paths. -fcopybook-deps also forces -E, -foneline-deps, -MT=copybooks, disables errors on missing copybooks and removes output on stdout
doc:
* gnucobol.texi: document new dependencies options