In musl > 1.1.21 freeaddrinfo() implementation changed and
was causing a segmentation fault.

diff --git a/gweb/gweb.c b/gweb/gweb.c
index 393afe0..12fcb1d 100644
--- a/gweb/gweb.c
+++ b/gweb/gweb.c
@@ -1274,7 +1274,8 @@ static bool is_ip_address(const char *host)
 	addr = NULL;
 
 	result = getaddrinfo(host, NULL, &hints, &addr);
-	freeaddrinfo(addr);
+	if(!result)
+		freeaddrinfo(addr);
 
 	return result == 0;
 }