Allow relative path when using dvd: or bd: URIs

ProgramInfo(const QString &_pathname) constructor would assume that any path containing ./ would be a relative path and use QFileInfo::absoluteFilePath() to determine the absolute path.
This would fail should _pathname actually be a URI.

This change allows playing a URI such as bd:../mount

mythtv/libs/libmyth/programinfo.cpp

@@ -762,7 +762,7 @@ ProgramInfo::ProgramInfo(const QString &_pathname) :
     QString basename = _pathname.section('/', -1);
     if (_pathname == basename)
         SetPathname(QDir::currentPath() + '/' + _pathname);
-    else if (_pathname.contains("./"))
+    else if (_pathname.contains("./") && !_pathname.contains(":"))
         SetPathname(QFileInfo(_pathname).absoluteFilePath());
     else
         SetPathname(_pathname);

mythtv/libs/libmythtv/ringbuffer.cpp

@@ -138,31 +138,23 @@ RingBuffer *RingBuffer::Create(
 
     if (!stream_only && (dvdurl || dvddir || dvdext))
     {
-        if (lfilename.left(6) == "dvd://")     // 'Play DVD' sends "dvd:/" + dev
-            lfilename.remove(0,5);             // e.g. "dvd://dev/sda"
-        else if (lfilename.left(5) == "dvd:/") // Less correct URI "dvd:" + path
-            lfilename.remove(0,4);             // e.g. "dvd:/videos/ET"
-        else if (lfilename.left(4) == "dvd:")   // Win32 URI "dvd:" + abs path
-            lfilename.remove(0,4);              //             e.g. "dvd:D:\"
-
-        if (mythurl || QFile::exists(lfilename))
-            LOG(VB_PLAYBACK, LOG_INFO, "Trying DVD at " + lfilename);
-        else
+        if (lfilename.left(4) == "dvd:")        // URI "dvd:" + path
+            lfilename.remove(0,4);              // e.g. "dvd:/dev/dvd"
+
+        if (!(mythurl || QFile::exists(lfilename)))
             lfilename = "/dev/dvd";
+        LOG(VB_PLAYBACK, LOG_INFO, "Trying DVD at " + lfilename);
 
         return new DVDRingBuffer(lfilename);
     }
     else if (!stream_only && (bdurl || bddir))
     {
-        if (lfilename.left(5) == "bd://")      // 'Play DVD' sends "bd:/" + dev
-            lfilename.remove(0,4);             // e.g. "bd://dev/sda"
-        else if (lfilename.left(4) == "bd:/")  // Less correct URI "bd:" + path
+        if (lfilename.left(3) == "bd:")        // URI "bd:" + path
             lfilename.remove(0,3);             // e.g. "bd:/videos/ET"
 
-        if (mythurl || QFile::exists(lfilename))
-            LOG(VB_PLAYBACK, LOG_INFO, "Trying BD at " + lfilename);
-        else
+        if (!(mythurl || QFile::exists(lfilename)))
             lfilename = "/dev/dvd";
+        LOG(VB_PLAYBACK, LOG_INFO, "Trying BD at " + lfilename);
 
         return new BDRingBuffer(lfilename);
     }