Add image/svg-xml as valid type to serve.

Was being turned into application/octet-stream rather than being displayed.

Author: rouilj

CHANGES.txt

@@ -11,6 +11,18 @@ Python v2.5 and v2.6.  Starting with the v1.6 releases of Roundup
 v2.7.2 or later are required to run newer releases of Roundup.  From v2.0
 onwards Python 3.4 and later are also supported.
 
+2021-xx-yy 2.1.0
+
+Fixed:
+
+- issue2551122 - fixing order by a link/multilink broke other props
+  should be final change for that ticket. (John Rouillard)
+
+Features:
+
+- add image/svg-xml as valid mime type to serve. Was being served as
+  octet-stream. (John Rouillard)
+
 2021-06-19 2.1.0b1
 
 Fixed:

roundup/cgi/client.py

@@ -1625,6 +1625,7 @@ def serve_file(self, designator, dre=re.compile(r'([^\d]+)(\d+)')):
             'image/gif',
             'image/jpeg',
             'image/png',
+            'image/svg+xml',
             'image/webp',
             'audio/ogg',
             'video/webm',