various fixes (#36697)

fixes bad address concat causing malformed address
Introduces new config options to for release attachments and number of
files to avoid sharing limits for PR/issue attachments and release ones

Fixes: https://github.com/go-gitea/gitea/issues/31638
Fixes: https://github.com/go-gitea/gitea/issues/35812
Doc update: https://gitea.com/gitea/docs/pulls/348
Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/setting/repository.go

@@ -100,6 +100,8 @@ var (
 		Release struct {
 			AllowedTypes     string
 			DefaultPagingNum int
+			FileMaxSize      int64
+			MaxFiles         int64
 		} `ini:"repository.release"`
 
 		Signing struct {
@@ -241,9 +243,13 @@ var (
 		Release: struct {
 			AllowedTypes     string
 			DefaultPagingNum int
+			FileMaxSize      int64
+			MaxFiles         int64
 		}{
 			AllowedTypes:     "",
 			DefaultPagingNum: 10,
+			FileMaxSize:      2048,
+			MaxFiles:         5,
 		},
 
 		// Signing settings