• 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

copyright

@@ -1,9 +1,9 @@
-$MirOS: src/bin/mksh/copyright,v 1.19 2007/01/17 01:24:29 tg Exp $
+$MirOS: src/bin/mksh/copyright,v 1.20 2007/03/04 03:04:23 tg Rel $
 
 The MirBSD Korn Shell (mksh) is
 
 Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-	Thorsten Glaser <tg@mirbsd.de>
+	Thorsten "mirabilos" Glaser <tg@mirbsd.de>
 
 Provided that these terms and disclaimer and all copyright notices
 are retained or reproduced in an accompanying document, permission
@@ -33,4 +33,4 @@ A number of files that are either always or conditionally included
 during compilation, depending on the target operating environment,
 are covered by different (2/3-clause BSD or similar) licences; re-
 fer to the individual files for details: alloc.c (always included)
-and setmode.c, strcasestr.c, strlfun.c
+and setmode.c, strlcpy.c