Add initial login failure example

examples/login-failure.log

@@ -0,0 +1,7 @@
+Oct 26 12:46:58 ldap.example.com slapd[11086]: conn=6862452 fd=34 ACCEPT from IP=192.168.1.1:56822 (IP=0.0.0.0:389)
+Oct 26 12:46:58 ldap.example.com slapd[11086]: conn=6862452 op=0 EXT oid=1.3.6.1.4.1.1466.20037
+Oct 26 12:46:58 ldap.example.com slapd[11086]: conn=6862452 op=0 STARTTLS
+Oct 26 12:46:58 ldap.example.com slapd[11086]: conn=6862452 op=0 RESULT oid= err=0 text=
+Oct 26 12:46:58 ldap.example.com slapd[11086]: conn=6862452 fd=34 TLS established tls_ssf=256 ssf=256
+Oct 26 12:46:58 ldap.example.com slapd[11086]: conn=6862452 op=1 BIND dn="mail=user@example.com,o=com,dc=example" method=128
+Oct 26 12:46:58 ldap.example.com slapd[11086]: conn=6862452 op=1 RESULT tag=97 err=49 text=