• 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

Build.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
-# $MirOS: src/bin/mksh/Build.sh,v 1.154 2007/03/03 21:36:06 tg Exp $
+# $MirOS: src/bin/mksh/Build.sh,v 1.155 2007/03/04 03:04:22 tg Exp $
 #-
-# Env: CC, CFLAGS, CPP, CPPFLAGS, LDFLAGS, LIBS, NOWARN, NROFF, TARGET_OS
+# Environment used: CC CFLAGS CPP CPPFLAGS LDFLAGS LIBS NOWARN NROFF TARGET_OS
 # CPPFLAGS recognised: MKSH_SMALL MKSH_ASSUME_UTF8 MKSH_NEED_MKNOD MKSH_NOPWNAM
 
 v()
@@ -597,8 +597,7 @@ if test 1 = $NEED_MKSH_SIGNAME; then
 fi
 
 addsrcs HAVE_SETMODE setmode.c
-addsrcs HAVE_STRCASESTR strcasestr.c
-addsrcs HAVE_STRLCPY strlfun.c
+addsrcs HAVE_STRLCPY strlcpy.c
 CPPFLAGS="$CPPFLAGS -DHAVE_CONFIG_H -DCONFIG_H_FILENAME=\\\"sh.h\\\""
 
 case $s:$HAVE_MKSH_NOPAM in