fix(git)!: use internal proxy for all git operations (#39426)

Introduces gitproxy module which spawns a small forward proxy as scanner
for git calls
Replaces hostmatcher with matchlist which supports port rules
Deprecates ALLOWED_DOMAINS/BLOCKED_DOMAINS and ALLOW_LOCALNETWORKS
settings in migration in favor of full names we have in security
configs.
Removes `external` preset in favor of lax/strict modes, strict mode
requiring explicit ports if they aren't standard http/s ones.

Breaking changes:
- `external` preset no longer works as deny rule. To enforce that, use
`strict` mode and allow ranges to connect to
- Wildcards are no longer accepted in IP addresses
- `*` is no longer allowed as entry in lists
- domain rules now use curl like syntax `*.example.com` matching
subdomains but not `example.com`, `example.com` matching itself and all
subdomains. `example.*` is not a valid rule
- In the default `lax` mode, `[security] ALLOWED_HOST_LIST` no longer
restricts public hosts, set `EGRESS_MODE = strict` to keep an exclusive
list. A startup warning flags this
- Invalid list entries are logged at startup, invalid
`BLOCKED_HOST_LIST`/`BLOCKED_DOMAINS` entries stop it

Docs: https://gitea.com/gitea/docs/pulls/557
Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: bircni <bircni@icloud.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

cmd/dump_repo.go

@@ -17,6 +17,7 @@ import (
 	"gitea.dev/modules/structs"
 	"gitea.dev/modules/util"
 	"gitea.dev/services/convert"
+	"gitea.dev/services/gitproxy"
 	"gitea.dev/services/migrations"
 
 	"github.com/urfave/cli/v3"
@@ -94,6 +95,9 @@ func runDumpRepository(ctx context.Context, cmd *cli.Command) error {
 	if err := git.InitSimple(); err != nil {
 		return err
 	}
+	if err := gitproxy.Run(ctx); err != nil {
+		return err
+	}
 
 	log.Info("AppPath: %s", setting.AppPath)
 	log.Info("AppWorkPath: %s", setting.AppWorkPath)