add new aversin and acoversin builtin functions.

Added new aversin(x, [,eps]) for inverse versed sine and acoversin(x, [,eps])
for inverse coversed sine.

Improved trig function help files to reference use of complex arguments
that while supported were not documented.

Removed old Makefile testing rules for make dbx and make gdb.

Improved "make run" to execute calccalc using shared libraries
from the local directory, and with reading of the startup scripts
disabled.

Changed "make prep" to perform various tests that are used to
help verify that calc is ready for a release.

Added Makefile testing rule testfuncsort to check for the sort
of the builtin function list.  Changed the order that builtin
functions are listed by "show builtin" and the help/builtin to
match the sorting of "LANG=C LC_ALL=C sort -d -u".

help/Makefile

@@ -199,37 +199,38 @@ BLT_HELP_FILES= ${BLT_HELP_FILES_3} ${BLT_HELP_FILES_5} \
 #
 # to keep this list in nice sorted order.
 #
-DETAIL_HELP= abs access acos acosh acot acoth acsc acsch address agd \
-	append appr arg argv arrow asec asech asin asinh assign atan atan2 \
-	atanh avg base base2 bernoulli bit blk blkcpy blkfree blocks bround \
-	btrunc calc_tty calclevel calcpath catalan ceil cfappr cfsim char \
-	cmdbuf cmp comb conj cos cosh cot coth count coversin cp csc csch \
-	ctime d2dm d2dms d2g d2r delete den dereference det digit digits \
-	display dms2d dp epsilon errcount errmax errno error estr euler eval \
-	exp fact factor fclose fcnt feof ferror fflush fgetc fgetfield \
-	fgetfile fgetline fgets fgetstr fib files floor fopen forall fpathopen \
-	fprintf fputc fputs fputstr frac free freebernoulli freeeuler \
-	freeglobals freeredc freestatics frem freopen fscan fscanf fseek fsize \
-	ftell g2d g2gm g2gms g2r gcd gcdrem gd getenv gms2g h2hm h2hms hash \
-	head highbit hmean hms2h hnrmod hypot ilog ilog10 ilog2 im indices \
-	inputlevel insert int inverse iroot isalnum isalpha isassoc isatty \
-	isblk iscntrl isconfig isdefined isdigit iserror iseven isfile isgraph \
-	ishash isident isint islist islower ismat ismult isnull isnum isobj \
-	isobjtype isodd isprime isprint isptr ispunct isqrt isrand israndom \
-	isreal isrel issimple isspace issq isstr istype isupper isxdigit \
-	jacobi join lcm lcmfact lfactor ln log log2 logn lowbit ltol makelist \
-	matdim matfill matmax matmin matsum mattrace mattrans max memsize meq \
-	min minv mmin mne mod modify name near newerror nextcand nextprime \
-	norm null num oldvalue ord param perm pfact pi pix places pmod polar \
-	poly pop popcnt pound power prevcand prevprime printf prompt protect \
-	ptest push putenv quo quomod r2d r2g rand randbit random randombit \
-	randperm rcin rcmul rcout rcpow rcsq re remove reverse rewind rm root \
-	round rsearch runtime saveval scale scan scanf search sec sech seed \
-	segment select sgn sha1 sin sinh size sizeof sleep sort sqrt srand \
-	srandom ssq stoponerror str strcasecmp strcat strcmp strcpy strerror \
-	strlen strncasecmp strncmp strncpy strpos strprintf strscan strscanf \
-	strtolower strtoupper substr sum swap system systime tail tan tanh \
-	test time trunc usertime versin version xor
+DETAIL_HELP= abs access acos acosh acot acoth acoversin acsc acsch \
+	address agd append appr arg argv arrow asec asech asin asinh assign \
+	atan atan2 atanh aversin avg base base2 bernoulli bit blk blkcpy \
+	blkfree blocks bround btrunc calc_tty calclevel calcpath catalan ceil \
+	cfappr cfsim char cmdbuf cmp comb conj cos cosh cot coth count \
+	coversin cp csc csch ctime d2dm d2dms d2g d2r delete den dereference \
+	det digit digits display dms2d dp epsilon errcount errmax errno error \
+	estr euler eval exp fact factor fclose fcnt feof ferror fflush fgetc \
+	fgetfield fgetfile fgetline fgets fgetstr fib files floor fopen forall \
+	fpathopen fprintf fputc fputs fputstr frac free freebernoulli \
+	freeeuler freeglobals freeredc freestatics frem freopen fscan fscanf \
+	fseek fsize ftell g2d g2gm g2gms g2r gcd gcdrem gd getenv gms2g h2hm \
+	h2hms hash head highbit hmean hms2h hnrmod hypot ilog ilog10 ilog2 im \
+	indices inputlevel insert int inverse iroot isalnum isalpha isassoc \
+	isatty isblk iscntrl isconfig isdefined isdigit iserror iseven isfile \
+	isgraph ishash isident isint islist islower ismat ismult isnull isnum \
+	isobj isobjtype isodd isprime isprint isptr ispunct isqrt isrand \
+	israndom isreal isrel issimple isspace issq isstr istype isupper \
+	isxdigit jacobi join lcm lcmfact lfactor ln log log2 logn lowbit ltol \
+	makelist matdim matfill matmax matmin matsum mattrace mattrans max \
+	memsize meq min minv mmin mne mod modify name near newerror nextcand \
+	nextprime norm null num oldvalue ord param perm pfact pi pix places \
+	pmod polar poly pop popcnt pound power prevcand prevprime printf \
+	prompt protect ptest push putenv quo quomod r2d r2g rand randbit \
+	random randombit randperm rcin rcmul rcout rcpow rcsq re remove \
+	reverse rewind rm root round rsearch runtime saveval scale scan scanf \
+	search sec sech seed segment select sgn sha1 sin sinh size sizeof \
+	sleep sort sqrt srand srandom ssq stoponerror str strcasecmp strcat \
+	strcmp strcpy strerror strlen strncasecmp strncmp strncpy strpos \
+	strprintf strscan strscanf strtolower strtoupper substr sum swap \
+	system systime tail tan tanh test time trunc usertime versin version \
+	xor
 
 # This list is of files that are clones of DETAIL_HELP files.  They are
 # built from DETAIL_HELP files.