evince: Use download.gnome.org

download.gnome.org sets HSTS, so it looks to be better maintained.

    $ curl -I https://ftp.gnome.org
    HTTP/1.1 200 OK
    Date: Tue, 04 Sep 2018 06:45:56 GMT
    Server: Apache/2.4.33 (Unix)
    Last-Modified: Mon, 02 Apr 2018 05:19:14 GMT
    Cache-Control: max-age=300
    Expires: Tue, 04 Sep 2018 06:50:56 GMT
    Content-Type: text/html;charset=UTF-8

    $ curl -I https://download.gnome.org
    HTTP/1.1 200 OK
    Date: Tue, 04 Sep 2018 06:46:04 GMT
    Server: Apache/2.4.6 (Red Hat Enterprise Linux)
    Strict-Transport-Security: max-age=15768000;includeSubdomains
    Content-Type: text/html;charset=UTF-8

evince.be0

@@ -11,7 +11,7 @@ BEE_BUILDTYPE=configure
 ## The source URL(s) define the location of the sources that will be
 ## downloaded. Version variables may be used to simplify reuse of this bee-file.
 
-SRCURL[0]="https://ftp.gnome.org/pub/gnome/sources/evince/${PKGVERSION[2]}/evince-${PKGVERSION}.tar.xz"
+SRCURL[0]="https://download.gnome.org/sources/evince/${PKGVERSION[2]}/evince-${PKGVERSION}.tar.xz"
 
 ###############################################################################
 ## Add URLs/pathes to patch files to the PATCHURL array.