A fix (bug #5823: mysql_install_db fails due to incorrect max_allowed_packet).

scripts/fill_help_tables.sh:
  percent_xxx variables added to avoid /0 error.
scripts/mysql_install_db.sh:
  A fix (bug #5823: mysql_install_db fails due to incorrect max_allowed_packet).          
  --net_buffer_length=16K added.
sql/net_serv.cc:
  Typo fixed.
sql/sql_parse.cc:
  A fix (bug #5823: mysql_install_db fails due to incorrect max_allowed_packet).
  Auto extend net buffer in bootstrap mode.

scripts/fill_help_tables.sh

@@ -454,10 +454,12 @@ sub print_verbose_errors
   print STDERR "number of help keywords            - ",$count_keywords,"\n";
     
   my $count_without_help= scalar(@without_help);
+  my $percent_without_help= $count_lex ?
+                            int (($count_without_help/$count_lex)*100) :
+                            "100";
   print_bad_names(\@without_help,"lexems without help (".
                             $count_without_help." ~ ".
-                            (int (($count_without_help/$count_lex)*100)).
-                            "%)");
+                            $percent_without_help."%)");
   print_bad_names(\@description_with_at,
           " topics below have symbol \'@\' in their descriptions.\n".
           "it's probably the litter from 'texi' tags (script needs fixing)");
@@ -467,10 +469,12 @@ sub print_verbose_errors
   print_bad_names(\@without_description,"topics without description");
     
   my $count_without_example= scalar(@without_example);
+  my $percent_without_example= $count_topics ?
+                            int (($count_without_example/$count_topics)*100) :
+                            "100";
   print_bad_names(\@without_example,"topics without example (".
                             $count_without_example." ~ ".
-                            (int (($count_without_example/$count_topics)*100)).
-                            "%)");
+                            $percent_without_example."%)");
 }
 
 print_verbose_errors if ($verbose_option ne 0);

scripts/mysql_install_db.sh

@@ -213,7 +213,7 @@ then
 fi
 mysqld_install_cmd_line="$mysqld $defaults $mysqld_opt --bootstrap \
 --skip-grant-tables --basedir=$basedir --datadir=$ldata --skip-innodb \
---skip-bdb --skip-ndbcluster $args --max_allowed_packet=8M"
+--skip-bdb --skip-ndbcluster $args --max_allowed_packet=8M --net_buffer_length=16K"
 if $scriptdir/mysql_create_system_tables $create_option $mdata $hostname $windows \
    | eval "$mysqld_install_cmd_line" 
 then

sql/net_serv.cc

@@ -165,8 +165,8 @@ my_bool net_realloc(NET *net, ulong length)
 
   if (length >= net->max_packet_size)
   {
-    DBUG_PRINT("error",("Packet too large. Max sixe: %lu",
-			net->max_packet_size));
+    DBUG_PRINT("error", ("Packet too large. Max size: %lu",
+               net->max_packet_size));
     net->error= 1;
     net->report_error= 1;
     net->last_errno= ER_NET_PACKET_TOO_LARGE;

sql/sql_parse.cc

@@ -1102,13 +1102,25 @@ extern "C" pthread_handler_decl(handle_bootstrap,arg)
   thd->init_for_queries();
   while (fgets(buff, thd->net.max_packet, file))
   {
-    uint length=(uint) strlen(buff);
-    if (buff[length-1]!='\n' && !feof(file))
+    ulong length= (ulong) strlen(buff);
+    while (buff[length-1] != '\n' && !feof(file))
     {
-      send_error(thd,ER_NET_PACKET_TOO_LARGE, NullS);
-      thd->fatal_error();
-      break;
+      /*
+        We got only a part of the current string. Will try to increase
+        net buffer then read the rest of the current string.
+      */
+      if (net_realloc(&(thd->net), 2 * thd->net.max_packet))
+      {
+        send_error(thd, thd->net.last_errno, NullS);
+        thd->is_fatal_error= 1;
+        break;
+      }
+      buff= (char*) thd->net.buff;
+      fgets(buff + length, thd->net.max_packet - length, file);
+      length+= (ulong) strlen(buff + length);
     }
+    if (thd->is_fatal_error)
+      break;
     while (length && (my_isspace(thd->charset(), buff[length-1]) ||
            buff[length-1] == ';'))
       length--;