Style fixes, comments for 4.1.1 authorization

Now special 1-byte packet is used for request of old password
Fixed bug with --skip-grant-tables and acl_getroot


include/mysql.h:
  removed scramble_323 member as now scramble_323 function does not count
  on trailing zero for scramble
include/mysql_com.h:
  updated declarations
libmysql/libmysql.c:
  now server sends special 1-byte packet instead of old scramble
  to re-request password.
  mysql->scramble_323 replaced with mysql->scramble
sql-common/client.c:
  now server sends special 1-byte packet instead of old scramble
  to re-request password.
  mysql->scramble_323 replaces with mysql->scramble
sql/password.c:
  comments beautified
  hash_password now accepts password length
sql/protocol.cc:
  added send_old_password_request function
sql/protocol.h:
  added send_old_password_request function
sql/sql_acl.cc:
  style fixes, bug with --skip-grant-tables and acl_getroot
  fixed
sql/sql_class.h:
  thd->scramble_323 removed as now
  old functions accept not null-terminated scrambles
sql/sql_crypt.cc:
  fixed with new hash_password proto
sql/sql_parse.cc:
  style fixes
  few comments added

sql/sql_crypt.cc

@@ -32,7 +32,7 @@
 SQL_CRYPT::SQL_CRYPT(const char *password)
 {
   ulong rand_nr[2];
-  hash_password(rand_nr,password);
+  hash_password(rand_nr,password, strlen(password));
   crypt_init(rand_nr);
 }