vendor and go mod. add ldap file

vendor/github.com/pyke369/golang-support/rcache/rcache.go

@@ -3,38 +3,25 @@ package rcache
 import (
 	"crypto/md5"
 	"regexp"
-	"runtime"
 	"sync"
 )
 
 var (
-	cores int
 	cache map[[16]byte]*regexp.Regexp = map[[16]byte]*regexp.Regexp{}
 	lock  sync.RWMutex
 )
 
 func Get(expression string) *regexp.Regexp {
-	if cores == 0 {
-		cores = runtime.NumCPU()
-	}
 	key := md5.Sum([]byte(expression))
-	if cores > 1 {
-		lock.RLock()
-	}
+	lock.RLock()
 	if cache[key] != nil {
-		if cores > 1 {
-			defer lock.RUnlock()
-		}
+		defer lock.RUnlock()
 		return cache[key].Copy()
 	}
-	if cores > 1 {
-		lock.RUnlock()
-	}
+	lock.RUnlock()
 	if regex, err := regexp.Compile(expression); err == nil {
-		if cores > 1 {
-			lock.Lock()
-			defer lock.Unlock()
-		}
+		lock.Lock()
+		defer lock.Unlock()
 		cache[key] = regex
 		return cache[key].Copy()
 	}