error_handler now only runs set_error_handler in web mode.

E_ALL notices, warnings, and errors are now reported, which causes
the test harness to fail.

Removes CLI-invoked E_NOTICE in:
* e107::prepare_request()
* e107::set_constants()
* e107::set_urls()

Resolves CLI-invoked E_NOTICE in:
* eIPHandler::__construct()
* eIPHandler::getCurrentIP()

Also resolves possible blank eIPHandler::$serverIP

\Helper\Unit::_beforeSuite() now sets E107_DEBUG_LEVEL so that
debug_handler.php sets the debug mode.

Also fixed E_NOTICE if E107_DEBUG_LEVEL is set beforehand

Resolves CLI-invoked E_NOTICE in:
* e_online::goOnline()

Resolves CLI-invoked E_NOTICE in:
* e_session::getValidateData()
* e_core_session::challenge()

- FIX: e107::coreLan() now loads the lan_admin.php file if the $admin argument is true
- FIX: Variable scope of $eplug_folder in e107plugin::uninstall()
- FIX: isset() check order in pluginsTest::makePluginReport()
- FIX: class2.php: Missing ADMINPERMS constant in CLI mode

- FIX: Do not redefine e_ADMIN_AREA in parser.php
- FIX: Null checks for e107TinyMceParser
- FIX: Array type check for e_bbcode::imgToBBcode()
- FIX: Optional query string in e_parse::thumbUrlDecode()
- FIX: Don't redefine TINYMCE_UNIT_TEST

Was causing an undefined index error

Also suppress mkdir() error in e_file::unzipGithubArchive()

e_DEBUG is already set because of the new test debug strategy

- MOD: e107::getTemplate() now accepts blank strings for the plugin name to mean
       that a core template should be loaded
- FIX: e_form::progressBar() now supports input values that already have % at the end
- FIX: Null check for $options['list'] in e_form::progressBar()
- NEW: Test rounding in e_formTest::testProgressBar()

Apparently e_marketplace depends on the admin area theme LAN

Also needed a null check in e_db_pdo::db_Query()

- FIX: e107::getTemplate() could be run without the necessary plugin LANs
- FIX: e107Test::testGetInstance() included e107_config.php too many times
- FIX: Empty check in e107Test::testGetTemplate()

- FIX: Null check during child recursion of e_tree_model::flattenTree()
- FIX: TreeModelTest::testTreeParentsAreAssignedCorrectly() apparently never worked until now because the wrong index was used

- FIX: Removed pointless (and invalid) destructor in LinkedIn::__destruct()
- FIX: All files that trigger this deprecation notice in PHP 7.4:
       "Array and string offset access syntax with curly braces is deprecated"

Apparently a bug introduced on 2004-09-21:
https://sourceforge.net/p/e107/svn/898/tree/trunk/e107_0.7/e107_languages/English/lan_ren_help.php

Just happens to be a misuse of the third parameter of define()

- FIX: Silenced compact() in e107Test::testInitCore()
- FIX: Null check in e_db_pdo::makeTableDef()
- FIX: Null check in e_db_mysql::makeTableDef()
- FIX: userlogin::login() had this warning on line 148:
       "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"?

- FIX: e_array::unserialize() HTML vomit in CLI mode
- FIX: e107_debug_shutdown() HTML vomit because $error_handler was not global

Apparently requires the "gallery" plugin to be installed

- FIX: Don't redefine MYSQL_* constants in e_db_pdo_class.php
- FIX: e_db_mysql::rowCount() could try to use mysql_num_rows() to count rows of a non-resource
- FIX: e_db_mysql::delete() stores the number of deleted rows in e_db_mysql::$mySQLrows
- FIX: e_db_abstractTest::testDb_Query() was fetching in PDO mode but shouldn't have been
- FIX: Typos in e_db_abstractTest::testDelete()
- MOD: Moved PDO-exclusive testBackup() from e_db_abstractTest to e_db_pdoTest
- FIX: e_db_mysqlTest now works in PHP 5.6 if the main e_db instance was in PDO mode but the test
       class initializes in legacy mode
- MOD: e_db_mysqlTest now asserts that PDO mode is not in use
- FIX: e_db_mysqlTest::testGetServerInfo() should now actually get a version number
- FIX: e_db_mysqlTest::testGetLastErrorNumber() has a different error code compared to PDO
- FIX: e_db_mysqlTest::testEscape() should actually get something from mysql_real_escape_string()

e_db_mysql has divorced e_db_pdo. They are now independently functioning implementations of e_db.

Finally no longer using the mysql_* functions removed in PHP 7.0

- MOD: Silently ignore failures to e_db_mysql::close(); if it's failing, it's probably already closed
- FIX: Close the PDO or mysqli connection after each e_db_abstractTest test
- MOD: Changed class2.php's $sql variable to be hinted as an e_db instead of e_db_mysql

codecept_output_dir() might not exist when the PHP-serialized coverage
report is being generated. phpunit/php-code-coverage >= 6.0.8 fix this
by creating that directory before writing the coverage report.

PHP 5.6 can only get phpunit/php-code-coverage up to version 4.0.8,
which does not have this fix. A workaround has been introduced in this
commit to allow PHP-serialized coverage reports to be stored with PHP
5.6.