fix: fix ldapserver crash bug (casdoor#1161)

* feat:Support simple ldap server

* fix:fix review problems

* fix:fix review problems

* fix: fix ldapserver crash bug

* Update ldapserver.go

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/dchest/captcha v0.0.0-20200903113550-03f5f0333e1f
 	github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc
 	github.com/duo-labs/webauthn v0.0.0-20211221191814-a22482edaa3b
-	github.com/forestmgy/ldapserver v1.0.9
+	github.com/forestmgy/ldapserver v1.1.0
 	github.com/go-gomail/gomail v0.0.0-20160411212932-81ebce5c23df
 	github.com/go-ldap/ldap/v3 v3.3.0
 	github.com/go-pay/gopay v1.5.72

go.sum

@@ -137,8 +137,8 @@ github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymF
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/forestmgy/ldapserver v1.0.9 h1:eMJKsN7Q/c9u074FVXfpPuTp3vOyH+O7Zpe6KfCCMUc=
-github.com/forestmgy/ldapserver v1.0.9/go.mod h1:1RZ8lox1QSY7rmbjdmy+sYQXY4Lp7SpGzpdE3+j3IyM=
+github.com/forestmgy/ldapserver v1.1.0 h1:gvil4nuLhqPEL8SugCkFhRyA0/lIvRdwZSqlrw63ll4=
+github.com/forestmgy/ldapserver v1.1.0/go.mod h1:1RZ8lox1QSY7rmbjdmy+sYQXY4Lp7SpGzpdE3+j3IyM=
 github.com/form3tech-oss/jwt-go v3.2.2+incompatible h1:TcekIExNqud5crz4xD2pavyTgWiPvpYe4Xau31I0PRk=
 github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=