support rsync in extract_schema

Author: ties

src/functions/extract_schema.cpp

@@ -30,7 +30,7 @@ namespace duckdb
             // |                - OR
             // (mailto|sms|tel) - Capturing group for other protocols (mailto, sms, tel)
             // :[^/]            - Matches ":" followed by any character except "/"
-            std::regex schema_regex (R"(^(http|https|ftp):\/\/|^(mailto|sms|tel):[^/])");
+            std::regex schema_regex (R"(^(http|https|ftp|rsync):\/\/|^(mailto|sms|tel):[^/])");
             std::smatch schema_match;
 
             // Use regex_search to find the schema component in the input string

test/sql/extract_schema.test

@@ -95,6 +95,13 @@ SELECT extract_schema('ftp:/example.com');
 ----
 (empty)
 
+# ---------------------------- RSYNC ----------------------------
+
+query I
+SELECT extract_schema('rsync://rpki.example.com');
+----
+rsync
+
 # ---------------------------- TEL ----------------------------
 
 query I