Fixed assert in perfschema/pfs.cc::start_idle_wait_v1 when using performance schema and big packets in debug version.

The bug was that my_real_read() called net_before_header_psi() multiple times for long packets.
Fixed by adding a flag when we are reading a header.
Did also some cleanups to interface of my_net_read() to avoid unnecessary calls if performance schema is not used.

- Added my_net_read_packet() as a replacement for my_net_read(). my_net_read() is still in the client library for old clients.
- Removed THD->m_server_idle (not needed anymore as this is now given as argument to my_net_read_packet()
- Added my_net_read_packet(), which is a new version of my_net_read() with a new parameter if we are doing a read for a new command from the server.
- Added tests for compressed protocol and big packets





include/mysql.h.pp:
  Added my_net_read_packet() as a replacement for my_net_read()
include/mysql_com.h:
  Added my_net_read_packet() as a replacement for my_net_read()
mysql-test/r/mysql_client_test_comp.result:
  New test
mysql-test/t/mysql_client_test-master.opt:
  Added max_allowed_packet to be able to test big packets and packet size overflows.
mysql-test/t/mysql_client_test_comp-master.opt:
  New test
mysql-test/t/mysql_client_test_nonblock-master.opt:
  Added max_allowed_packet to be able to test big packets and packet size overflows.
sql-common/client.c:
  Use my_net_read_packet()
sql/mf_iocache.cc:
  Use my_net_read_packet()
sql/mysqld.cc:
  Removed THD->m_server_idle (not needed anymore as this is now given as argument to my_net_read_packet()
sql/net_serv.cc:
  Added argument to my_real_read() to indicte if we are reading the first block of the next statement and should call performance schema.
  Added 'compatibilty function' my_net_read().
  Added my_net_read_packet(), which is a new version of my_net_read() with a new parameter if we are doing a read for a new command from the server.
sql/sql_class.cc:
  Removed m_server_idle (not needed anymore)
sql/sql_class.h:
  Removed m_server_idle (not needed anymore)
sql/sql_parse.cc:
  Removed m_server_idle (not needed anymore)
tests/mysql_client_test.c:
  Added tests for compressed protocol and big packets

include/mysql.h.pp

@@ -49,9 +49,9 @@ enum enum_field_types { MYSQL_TYPE_DECIMAL, MYSQL_TYPE_TINY,
    MYSQL_TYPE_DATETIME, MYSQL_TYPE_YEAR,
    MYSQL_TYPE_NEWDATE, MYSQL_TYPE_VARCHAR,
    MYSQL_TYPE_BIT,
-   MYSQL_TYPE_TIMESTAMP2,
-   MYSQL_TYPE_DATETIME2,
-   MYSQL_TYPE_TIME2,
+                        MYSQL_TYPE_TIMESTAMP2,
+                        MYSQL_TYPE_DATETIME2,
+                        MYSQL_TYPE_TIME2,
                         MYSQL_TYPE_NEWDECIMAL=246,
    MYSQL_TYPE_ENUM=247,
    MYSQL_TYPE_SET=248,
@@ -94,7 +94,7 @@ my_bool net_write_command(NET *net,unsigned char command,
      const unsigned char *header, size_t head_len,
      const unsigned char *packet, size_t len);
 int net_real_write(NET *net,const unsigned char *packet, size_t len);
-unsigned long my_net_read(NET *net);
+unsigned long my_net_read_packet(NET *net, my_bool read_from_server);
 struct sockaddr;
 int my_connect(my_socket s, const struct sockaddr *name, unsigned int namelen,
         unsigned int timeout);
@@ -553,7 +553,7 @@ int mysql_list_processes_cont(MYSQL_RES **ret, MYSQL *mysql,
 int mysql_options(MYSQL *mysql,enum mysql_option option,
           const void *arg);
 int mysql_options4(MYSQL *mysql,enum mysql_option option,
-                   const void *arg1, const void *arg2);
+                                       const void *arg1, const void *arg2);
 void mysql_free_result(MYSQL_RES *result);
 int mysql_free_result_start(MYSQL_RES *result);
 int mysql_free_result_cont(MYSQL_RES *result, int status);