don't build strstorage and strduptab (tinyldap doesn't use it anymore)

add comments in strstorage.c and strduptab.c that they are obsolete

Makefile

@@ -1,7 +1,7 @@
 #DEBUG=1
 #COVERAGE=1
 
-all: libowfat-warning t1 t2 parse dumpidx idx2ldif addindex bindrequest tinyldap \
+all: libowfat-warning t2 parse dumpidx idx2ldif addindex bindrequest tinyldap \
 tinyldap_standalone tinyldap_debug ldapclient ldapclient_str \
 md5password mysql2ldif acl dumpacls ldapdelete asn1dump tls.a x # t6 # t
 
@@ -36,7 +36,7 @@ scan_ldapmessage_nolengthcheck.o
 
 ldif.a: ldif_parse.o ldap_match_mapped.o
 
-storage.a: strstorage.o strduptab.o mstorage_add.o mduptab_add.o \
+storage.a: mstorage_add.o mduptab_add.o \
 bstr_diff.o mduptab_adds.o bstr_diff2.o mstorage_add_bin.o \
 mstorage_init.o mstorage_init_persistent.o mstorage_unmap.o \
 mduptab_init.o mduptab_init_reuse.o mduptab_reset.o

strduptab.c

@@ -1,3 +1,6 @@
+/* This is no longer used in tinyldap (see mduptab.h).
+ * The sources are here for historic reference. */
+
 #include <stdlib.h>
 #include <libowfat/str.h>
 #include "strduptab.h"
@@ -13,9 +16,10 @@ const char* strduptab_add(struct stringduptable* t,const char* s) {
       return t->s[i];
   if (t->n>=t->a) {
     const char** x;
-    int a=t->a*2;
+    size_t a=t->a*2;	// this can not overflow
+	// t->s is t->a*sizeof(char*), which is always at least *2
     if (!a) a=1024;
-    if (!(x=realloc((char**)t->s,a*sizeof(char*))))
+    if (!(x=reallocarray((char**)t->s,a,sizeof(char*))))
       return 0;
     t->a=a;
     t->s=x;

strstorage.c

@@ -1,3 +1,6 @@
+/* This is no longer used in tinyldap (see mstorage.h)
+ * The sources are here for historic reference. */
+
 #include <stdlib.h>
 #include <libowfat/byte.h>
 #include "strstorage.h"