[Minor] Place default extensions map to the config
[Minor] Place default extensions map to the config

minaevmike/rspamd,andrejzverev/rspamd,AlexeySa/rspamd,AlexeySa/rspamd,minaevmike/rspamd,andrejzverev/rspamd,AlexeySa/rspamd,minaevmike/rspamd,andrejzverev/rspamd,andrejzverev/rspamd,minaevmike/rspamd,andrejzverev/rspamd,AlexeySa/rspamd,minaevmike/rspamd,AlexeySa/rspamd,AlexeySa/rspamd,andrejzverev/rspamd,AlexeySa/rspamd,AlexeySa/rspamd,AlexeySa/rspamd,minaevmike/rspamd,andrejzverev/rspamd,minaevmike/rspamd,minaevmike/rspamd,minaevmike/rspamd,andrejzverev/rspamd