fail2ban: add datepattern and conf for sshd

* add the jail.local config to enable fail2ban on ssh to prevent
  brute force attack
* add datepattern for fail2ban to be able to function with syslog-ng
  generated /var/log/messages

net/fail2ban/Makefile

@@ -73,6 +73,7 @@ define Py3Package/fail2ban/install
 
 	$(INSTALL_DIR) $(1)/etc/fail2ban/
 	$(CP) $(PKG_BUILD_DIR)/config/* $(1)/etc/fail2ban/
+	$(INSTALL_DATA) ./files/jail.local $(1)/etc/fail2ban/
 
 	$(INSTALL_DIR) $(1)/etc/fail2ban/fail2ban.d
 	$(INSTALL_DATA) ./files/db.conf $(1)/etc/fail2ban/fail2ban.d/db.conf

net/fail2ban/files/jail.local

+[sshd]
+enabled = true
+port = ssh
+filter = sshd
+logpath = /var/log/messages
+maxretry = 3
+findtime = 10
+bantime = 120
+ignoreip = 127.0.0.1

net/fail2ban/patches/030-sshd-datepattern.patch

+--- a/config/filter.d/sshd.conf
++++ b/config/filter.d/sshd.conf
+@@ -36,6 +36,8 @@
+ 
+ [Definition]
+ 
++datepattern = ^%%b %%d %%H:%%M:%%S
++
+ prefregex = ^<F-MLFID>%(__prefix_line)s</F-MLFID>%(__pref)s<F-CONTENT>.+</F-CONTENT>$
+ 
+ cmnfailre = ^[aA]uthentication (?:failure|error|failed) for <F-USER>.*</F-USER> from <HOST>( via \S+)?%(__suff)s$