Move ref path matching to connect.c library

It's a generic thing for matching refs from the other side.

cache.h

@@ -261,6 +261,7 @@ struct pack_entry {
 
 extern int git_connect(int fd[2], char *url, const char *prog);
 extern int finish_connect(pid_t pid);
+extern int path_match(const char *path, int nr, char **match);
 
 extern void prepare_packed_git(void);
 extern int use_packed_git(struct packed_git *);

connect.c

@@ -1,6 +1,27 @@
 #include "cache.h"
 #include <sys/wait.h>
 
+int path_match(const char *path, int nr, char **match)
+{
+	int i;
+	int pathlen = strlen(path);
+
+	for (i = 0; i < nr; i++) {
+		char *s = match[i];
+		int len = strlen(s);
+
+		if (!len || len > pathlen)
+			continue;
+		if (memcmp(path + pathlen - len, s, len))
+			continue;
+		if (pathlen > len && path[pathlen - len - 1] != '/')
+			continue;
+		*s = 0;
+		return 1;
+	}
+	return 0;
+}
+
 /*
  * First, make it shell-safe.  We do this by just disallowing any
  * special characters. Somebody who cares can do escaping and let

send-pack.c

@@ -4,27 +4,6 @@
 static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*";
 static const char *exec = "git-receive-pack";
 
-static int path_match(const char *path, int nr, char **match)
-{
-	int i;
-	int pathlen = strlen(path);
-
-	for (i = 0; i < nr; i++) {
-		char *s = match[i];
-		int len = strlen(s);
-
-		if (!len || len > pathlen)
-			continue;
-		if (memcmp(path + pathlen - len, s, len))
-			continue;
-		if (pathlen > len && path[pathlen - len - 1] != '/')
-			continue;
-		*s = 0;
-		return 1;
-	}
-	return 0;
-}
-
 struct ref {
 	struct ref *next;
 	unsigned char old_sha1[20];