improve argument descr string, improve restricted path regex matching

Signed-off-by: kim (grufwub) <grufwub@gmail.com>

core/regex.go

@@ -117,7 +117,7 @@ func withinCGIDirDisabled(p *Path) bool {
 // isRestrictedPathEnabled returns whether a Path's relative value is restricted
 func isRestrictedPathEnabled(p *Path) bool {
 	for _, regex := range restrictedPaths {
-		if regex.MatchString(p.Relative()) {
+		if regex.MatchString(p.Selector()) {
 			return true
 		}
 	}

core/string_constants.go

@@ -72,7 +72,7 @@ const (
 	httpPrefixBufDescStr = "Buffer size used for stripping HTTP headers"
 
 	userDirFlagStr = "user-dir"
-	userDirDescStr = "User's personal server directory"
+	userDirDescStr = "User subdir for personal server space"
 
 	versionFlagStr = "version"
 	versionDescStr = "Print version string"