Add Portable Font Resource `application/font-tdpfr`.

Bitstream's TrueDoc Portable Font Resource format is part of several
digital TV broadcast specifications and is documented as RFC 3073:
https://datatracker.ietf.org/doc/html/rfc3073

```
   Magic number(s): 50 46 52 30 hex
   File extension(s): PFR
   Macintosh File Type Code(s): Creator: 'b$pw' Type: 'PFR '
```

There is also a newer version of the format with `50 46 52 31` hex (PRF1),
such as the test file included here. `libmagic` also recognizes `PRF1`:
https://github.com/file/file/blob/7a821aedc144f70ec848ea632a64db74b79563c1/magic/Magdir/fonts#L249-L252

The Bitstream specifications are available from Wayback Machine:
https://web.archive.org/web/20040407162455/http://www.bitstream.com/categories/developer/truedoc/pfrspec.html

"The PFR specification defines the Bitstream portable font resource (PFR),
which is a compact, platform-independent format for representing high-quality,
scalable outline fonts.
Many independent organizations responsible for setting digital TV standards
have adopted the PFR font format as their standard font format, including:

- ATSC (Advanced Television Systems Committee)
- DAVIC (Digital Audio Visual Council)
- DVB (Digital Video Broadcasting)
- DTG (Digital TV Group)
- MHP (Multimedia Home Platform)
- ISO/IEC 16500-6:1999
- OCAP (OpenCable Application Platform)"

Per RFC 3073, "The PFR media type has been previously registered with IANA as
`application/vnd.truedoc`.  In view of its subsequent widespread adoption as
a standard font format by multiple standards bodies who have relationships with
the Internet community, Bitstream has been asked to re-register this media type
within the IETF tree."
https://www.iana.org/assignments/media-types/application/vnd.truedoc
http://www.iana.org/assignments/media-types/application/font-tdpfr

This format was once supported for downloadable web fonts in Netscape 4.x.

3 files changed, 13 insertions, 0 deletions

diff --git a/data/freedesktop.org.xml.in b/data/freedesktop.org.xml.in
index 5350ecf..651fe55 100644
--- a/data/freedesktop.org.xml.in
+++ b/data/freedesktop.org.xml.in
@@ -2298,6 +2298,18 @@ command to generate the output files.
       <match type="string" value="\x13\x7A\x2B" offset="8"/>
     </magic>
   </mime-type>
+  <mime-type type="application/font-tdpfr">
+    <comment>TDPFR font</comment>
+    <acronym>TDPFR</acronym>
+    <expanded-acronym>TrueDoc Portable Font Resource</expanded-acronym>
+    <generic-icon name="font-x-generic"/>
+    <magic>
+      <match type="big32" value="0x50465230" offset="0"/>
+      <match type="big32" value="0x50465231" offset="0"/>
+    </magic>
+    <glob pattern="*.pfr"/>
+    <alias type="application/vnd.truedoc"/>
+  </mime-type>
   <mime-type type="application/x-font-tex">
     <comment>TeX font</comment>
     <generic-icon name="font-x-generic"/>
diff --git a/tests/mime-detection/list b/tests/mime-detection/list
index 341306a..499fbde 100644
--- a/tests/mime-detection/list
+++ b/tests/mime-detection/list
@@ -791,6 +791,7 @@ test-en.mo application/x-gettext-translation
 LiberationSans-Regular.ttf font/ttf
 # Converted from LiberationSans-Regular.ttf with http://ttf2woff.com/
 LiberationSans-Regular.woff font/woff
+test.pfr application/font-tdpfr
 nrl.trig application/trig oxo
 # Copied from http://git.savannah.gnu.org/cgit/gnash.git/plain/testsuite/samples/subshapes.swf
 subshapes.swf application/vnd.adobe.flash.movie
diff --git a/tests/mime-detection/test.pfr b/tests/mime-detection/test.pfr
new file mode 100644
index 0000000..cbc44fc
--- /dev/null
+++ b/tests/mime-detection/test.pfr