Update DSS URLs to https.

Retrieving DSS images was not working because we got a service
redirect HTML blurb instead of an image.

kstars/auxiliary/ksdssdownloader.cpp

@@ -136,7 +136,7 @@ QString KSDssDownloader::getDSSURL(const dms &ra, const dms &dec, float width, f
 
     QString version   = version_.toLower();
     QString type      = type_.toLower();
-    QString URLprefix = QString("http://archive.stsci.edu/cgi-bin/dss_search?v=%1&").arg(version);
+    QString URLprefix = QString("https://archive.stsci.edu/cgi-bin/dss_search?v=%1&").arg(version);
     QString URLsuffix = QString("&e=J2000&f=%1&c=none&fov=NONE").arg(type);
 
     char decsgn = (dec.Degrees() < 0.0) ? '-' : '+';

kstars/auxiliary/ksutils.cpp

@@ -125,7 +125,7 @@ QString getDSSURL(const SkyPoint *const p)
 
 QString getDSSURL(const dms &ra, const dms &dec, float width, float height, const QString &type)
 {
-    const QString URLprefix("http://archive.stsci.edu/cgi-bin/dss_search?");
+    const QString URLprefix("https://archive.stsci.edu/cgi-bin/dss_search?");
     QString URLsuffix             = QString("&e=J2000&f=%1&c=none&fov=NONE").arg(type);
     const double dss_default_size = Options::defaultDSSImageSize();
 

kstars/skymap.cpp

@@ -477,7 +477,7 @@ void SkyMap::slotDSS()
     if (kstars)
     {
         new ImageViewer(
-            url, i18n("Digitized Sky Survey image provided by the Space Telescope Science Institute [public domain]."),
+            url, i18n("Digitized Sky Survey image provided by the Space Telescope Science Institute [free for non-commercial use]."),
             this);
         //iv->show();
     }
@@ -545,8 +545,8 @@ void SkyMap::slotSDSS()
     // implemented in ObservingList::setCurrentImage() etc. in
     // tools/observinglist.cpp; must try to de-duplicate as much as
     // possible.
-    QString URLprefix("http://casjobs.sdss.org/ImgCutoutDR6/getjpeg.aspx?");
-    QString URLsuffix("&scale=1.0&width=600&height=600&opt=GST&query=SR(10,20)");
+    QString URLprefix("http://skyserver.sdss.org/dr16/SkyServerWS/ImgCutout/getjpeg?");
+    QString URLsuffix("&scale=1.0&width=600&height=600");
     dms ra(0.0), dec(0.0);
     QString RAString, DecString;