Feature: Allow passing in extra options to MYSQL executable (#805)

* Add MYSQL_EXTRA_OPTIONS environment variable for mysql service, using an empty string by default

* Use new MYSQL_EXTRA_OPTIONS in sail shell script to pass in options whenever sail mysql gets executed

* Remove :-"" from mysql.stub

* fix typo

Author: ipontt

bin/sail

@@ -489,7 +489,7 @@ elif [ "$1" == "mysql" ]; then
         ARGS+=(exec)
         [ ! -t 0 ] && ARGS+=(-T)
         ARGS+=(mysql bash -c)
-        ARGS+=("MYSQL_PWD=\${MYSQL_PASSWORD} mysql -u \${MYSQL_USER} \${MYSQL_DATABASE}")
+        ARGS+=("MYSQL_PWD=\${MYSQL_PASSWORD} mysql -u \${MYSQL_USER} \${MYSQL_DATABASE} \${MYSQL_EXTRA_OPTIONS}")
     else
         sail_is_not_running
     fi

stubs/mysql.stub

@@ -9,6 +9,7 @@ mysql:
         MYSQL_USER: '${DB_USERNAME}'
         MYSQL_PASSWORD: '${DB_PASSWORD}'
         MYSQL_ALLOW_EMPTY_PASSWORD: 1
+        MYSQL_EXTRA_OPTIONS: '${MYSQL_EXTRA_OPTIONS}'
     volumes:
         - 'sail-mysql:/var/lib/mysql'
         - './vendor/laravel/sail/database/mysql/create-testing-database.sh:/docker-entrypoint-initdb.d/10-create-testing-database.sh'