MDEV-11111: fix more buildbot failures

- main.mysqld--help: the three --embedded-* options are listed.
- debian: libmariadb3.symbols gets mariadb_set_embedded_hooks.
- mysqltest: allow 256 --server-arg (the private server of an embedded
  run gets more than 64 with the options of the test and of mtr).
- embedded runs: skip the tests that need a TCP listener, which the
  private server does not have (pool of threads, ssl_verify_ip,
  ssl_7937); main.variables sees skip_networking ON there.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

client/mysqltest.cc

@@ -73,7 +73,7 @@ static my_bool non_blocking_api_enabled= 0;
 
 #define MAX_VAR_NAME_LENGTH    256
 #define MAX_COLUMNS            256
-#define MAX_EMBEDDED_SERVER_ARGS 64
+#define MAX_EMBEDDED_SERVER_ARGS 256
 #define MAX_DELIMITER_LENGTH 16
 #define DEFAULT_MAX_CONN        64
 

debian/libmariadb3.symbols

@@ -25,6 +25,7 @@ libmariadb.so.3 libmariadb3 #MINVER#
  mariadb_rpl_init_ex@libmariadb_3 3.3.0
  mariadb_rpl_open@libmariadb_3 3.1.0
  mariadb_rpl_optionsv@libmariadb_3 3.1.0
+ mariadb_set_embedded_hooks@libmariadb_3 3.4.10
  mariadb_stmt_execute_direct@libmariadb_3 3.0.0
  mariadb_stmt_fetch_fields@libmariadb_3 3.1.0
  mysql_affected_rows@libmariadbclient_18 3.0.0

mysql-test/include/have_pool_of_threads.inc

@@ -1,3 +1,4 @@
+--source include/not_embedded.inc
 --source include/not_aix.inc
 --require include/have_pool_of_threads.require
 disable_query_log;

mysql-test/main/mysqld--help.result

@@ -317,6 +317,17 @@ The following specify which files/extra groups are read (specified before remain
  --div-precision-increment=# 
  Precision of the result of '/' operator will be increased
  on that value
+ --embedded-client-pid=# 
+ Used by the embedded server launcher. The only process
+ that may connect
+ --embedded-defaults-groups=name 
+ Used by the embedded server launcher. The option groups
+ to read, instead of those of a server, separated by
+ commas
+ --embedded-lifeline=name 
+ Used by the embedded server launcher. Inherited pipe fd
+ (HANDLE on Windows) that the server watches; on EOF the
+ server shuts down
  --encrypt-binlog    Encrypt binary logs (including relay logs)
  --encrypt-tmp-disk-tables 
  Encrypt temporary on-disk tables (created as part of
@@ -1808,6 +1819,9 @@ delayed-insert-timeout 300
 delayed-queue-size 1000
 disconnect-on-expired-password FALSE
 div-precision-increment 4
+embedded-client-pid 0
+embedded-defaults-groups (No default value)
+embedded-lifeline (No default value)
 encrypt-binlog FALSE
 encrypt-tmp-disk-tables FALSE
 encrypt-tmp-files FALSE

mysql-test/main/ssl_7937.test

@@ -2,6 +2,7 @@
 # MDEV-7937: Enforce SSL when --ssl client option is used
 #
 
+source include/not_embedded.inc;
 source include/have_ssl_crypto_functs.inc;
 
 # create a procedure instead of SHOW STATUS LIKE 'ssl_cipher'

mysql-test/main/ssl_verify_ip.test

@@ -1,3 +1,4 @@
+source include/not_embedded.inc;
 source include/have_ssl_crypto_functs.inc;
 --exec $MYSQL --protocol=tcp --host=127.0.0.1 --ssl-ca=$MYSQL_TEST_DIR/std_data/cacert.pem --ssl --ssl-verify-server-cert -e "select 1"
 --exec $MYSQL --protocol=tcp --host=localhost --ssl-ca=$MYSQL_TEST_DIR/std_data/cacert.pem --ssl --ssl-verify-server-cert -e "select 1"

mysql-test/main/variables.test

@@ -1089,9 +1089,12 @@ SET @@session.skip_external_locking= true;
 SET @@global.skip_external_locking= true;
 #
 --echo #
+# The private server of an embedded run has no network listener
+--replace_result ON OFF
 SHOW VARIABLES like 'skip_networking';
 --error ER_INCORRECT_GLOBAL_LOCAL_VAR
 SELECT @@session.skip_networking;
+--replace_result 1 0
 SELECT @@global.skip_networking;
 --error ER_INCORRECT_GLOBAL_LOCAL_VAR
 SET @@session.skip_networking= true;