Fixed compiler and test failures found by buildbot

configure.in:
  Added testing of STRNDUP (not found on solaris)
mysql-test/include/wait_until_connected_again.inc:
  Also test for error 2005 (can happen on windows)
mysql-test/include/wait_until_disconnected.inc:
  Also test for error 2005 (can happen on windows)
mysql-test/suite/innodb_plugin/r/innodb_bug30423.result:
  Number of rows is not stable (found difference on Solaris)
mysql-test/suite/innodb_plugin/t/innodb_bug30423.test:
  Number of rows is not stable (found difference on Solaris)
plugin/auth_pam/auth_pam.c:
  Use internal strndup if it doesn't exist on system (solaris)
  Changed code so that it should also compile on solaris.

configure.in

@@ -2033,7 +2033,7 @@ dnl Checks for library functions.
 AC_FUNC_ALLOCA
 AC_PROG_GCC_TRADITIONAL
 AC_TYPE_SIGNAL
-AC_CHECK_FUNCS(re_comp regcomp strdup)
+AC_CHECK_FUNCS(re_comp regcomp strdup strndup)
 
 dnl Sun compilers have their own vis.h that is about something
 dnl totally different. So, not to change the libedit source, we

mysql-test/include/wait_until_connected_again.inc

@@ -14,7 +14,7 @@ while ($mysql_errno)
   # Strangely enough, the server might return "Too many connections"
   # while being shutdown, thus 1040 is an "allowed" error
   # See BUG#36228
-  --error 0,1040,1053,2002,2003,2006,2013
+  --error 0,1040,1053,2002,2003,2005,2006,2013
   show status;
 
   dec $counter;

mysql-test/include/wait_until_disconnected.inc

@@ -12,7 +12,7 @@ while (!$mysql_errno)
   # Strangely enough, the server might return "Too many connections"
   # while being shutdown, thus 1040 is an "allowed" error.
   # See BUG#36228.
-  --error 0,1040,1053,2002,2003,2006,2013
+  --error 0,1040,1053,2002,2003,2005,2006,2013
   show status;
 
   dec $counter;

mysql-test/suite/innodb_plugin/r/innodb_bug30423.result

@@ -48,9 +48,9 @@ ON orgs.org_id=sa_opportunities.org_id
 LEFT JOIN bug30243_2 contacts
 ON orgs.org_id=contacts.org_id ;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	orgs	index	NULL	org_id	4	NULL	128	Using index
-1	SIMPLE	sa_opportunities	ref	org_id	org_id	5	test.orgs.org_id	1	Using index
-1	SIMPLE	contacts	ref	contacts$org_id	contacts$org_id	5	test.orgs.org_id	1	Using index
+1	SIMPLE	orgs	index	NULL	org_id	4	NULL	#	Using index
+1	SIMPLE	sa_opportunities	ref	org_id	org_id	5	test.orgs.org_id	#	Using index
+1	SIMPLE	contacts	ref	contacts$org_id	contacts$org_id	5	test.orgs.org_id	#	Using index
 select @@innodb_stats_method;
 @@innodb_stats_method
 nulls_ignored

mysql-test/suite/innodb_plugin/t/innodb_bug30423.test

@@ -140,6 +140,7 @@ analyze table bug30243_3;
 
 # Following query plan shows that we get the correct rows per
 # unique value (should be approximately 1 row per value)
+--replace_column 9 #
 explain SELECT COUNT(*), 0
 	FROM bug30243_1 orgs
 	LEFT JOIN bug30243_3 sa_opportunities

plugin/auth_pam/auth_pam.c

 #include <mysql/plugin_auth.h>
 #include <string.h>
+#include <my_config.h>
 #include <security/pam_appl.h>
 #include <security/pam_modules.h>
 
@@ -8,6 +9,24 @@ struct param {
   MYSQL_PLUGIN_VIO *vio;
 };
 
+/* It least solaris doesn't have strndup */
+
+#ifndef HAVE_STRNDUP
+char *strndup(const char *from, size_t length)
+{
+  char *ptr;
+  size_t max_length= strlen(from);
+  if (length > max_length)
+    length= max_length;
+  if ((ptr= (char*) malloc(length+1)) != 0)
+  {
+    memcpy((char*) ptr, (char*) from, length);
+    ptr[length]=0;
+  }
+  return ptr;
+}
+#endif
+
 static int conv(int n, const struct pam_message **msg,
                 struct pam_response **resp, void *data)
 {
@@ -71,13 +90,21 @@ static int conv(int n, const struct pam_message **msg,
 
 #define DO(X) if ((status = (X)) != PAM_SUCCESS) goto end
 
+#ifdef SOLARIS
+typedef void** pam_get_item_3_arg;
+#else
+typedef const void** pam_get_item_3_arg;
+#endif
+
 static int pam_auth(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
 {
   pam_handle_t *pamh = NULL;
   int status;
   const char *new_username;
   struct param param;
-  struct pam_conv c = { &conv, &param };
+  /* The following is written in such a way to make also solaris happy */
+  struct pam_conv pam_start_arg = { &conv, NULL };
+  pam_start_arg.appdata_ptr= (char*) &param;
 
   /*
     get the service name, as specified in
@@ -90,10 +117,10 @@ static int pam_auth(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
   param.ptr = param.buf + 1;
   param.vio = vio;
 
-  DO( pam_start(service, info->user_name, &c, &pamh) );
+  DO( pam_start(service, info->user_name, &pam_start_arg, &pamh) );
   DO( pam_authenticate (pamh, 0) );
   DO( pam_acct_mgmt(pamh, 0) );
-  DO( pam_get_item(pamh, PAM_USER, (const void**)&new_username) );
+  DO( pam_get_item(pamh, PAM_USER, (pam_get_item_3_arg) &new_username) );
 
   if (new_username && strcmp(new_username, info->user_name))
     strncpy(info->authenticated_as, new_username,