Merge branch 'rs/config-write-section-fix' into maint

There was a recent semantic mismerge in the codepath to write out a
section of a configuration section, which has been corrected.

* rs/config-write-section-fix:
  config: flip return value of write_section()
diff --git a/config.c b/config.c
index adb7d7a..c38401a 100644
--- a/config.c
+++ b/config.c
@@ -2315,7 +2315,7 @@
 	struct strbuf sb = store_create_section(key);
 	ssize_t ret;
 
-	ret = write_in_full(fd, sb.buf, sb.len) == sb.len;
+	ret = write_in_full(fd, sb.buf, sb.len);
 	strbuf_release(&sb);
 
 	return ret;