• remove strcasestr.c, use home-grown implementation¹, call it stricmp,

and have it return an API-correct const char *
• enhance and stylify comments
• a little KNF and simplifications
• #ifdef DEBUG: replace strchr and strstr with ucstrchr and ucstrstr
  that take and return a non-const char *, and fix the violations
• new cstrchr, cstrstr (take and give const char *)
• new vstrchr, vstrstr (take const or not, give boolean value)
• new afreechk(x) = afreechv(x,x) = if (x1) afree(x2, ATEMP)
• new ksh_isdash(str) = (str != NULL) && !strcmp(str, "-")
• replace the only use of strrchr with inlined code to shrink
• minor man page fixes
• Minix 3 signames are autogenerated with gcc
• rename strlfun.c to strlcpy.c since we don't do strlcat(3) anyway,
  only strlcpy(3), and shorten it
• dot.mkshrc: move MKSH=… down to the export line
  to not disturb the PS1 visual impression ☺
• dot.mkshrc: Lstripcom(): optimise
• bump version

¹) side effect from creating API-correct cstrchr, cstrstr, etc.
   uses goto so it must be better ☻

tested on mirbsd-current via both Makefile and Build.sh

var.c

@@ -2,7 +2,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/var.c,v 1.36 2007/03/04 00:13:17 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/var.c,v 1.37 2007/03/04 03:04:28 tg Exp $");
 
 /*
  * Variables
@@ -1139,7 +1139,7 @@ arrayname(const char *str)
 {
 	const char *p;
 
-	if ((p = strchr(str, '[')) == 0)
+	if ((p = cstrchr(str, '[')) == 0)
 		/* Shouldn't happen, but why worry? */
 		return str_save(str, ATEMP);