dpkg-source: add "3.0 (quilt)" in the (fallback) list of formats to try

debian/changelog

@@ -3,6 +3,8 @@ dpkg (1.15.5.3) UNRELEASED; urgency=low
   [ Raphael Hertzog ]
   * Avoid usage of IO::String in dpkg-scanpackages, rely on Dpkg::IPC
     instead to directly get a pipe file descriptor. Closes: #557013
+  * Put "3.0 (quilt)" in the default list of formats tried by dpkg-source
+    after "1.0" and before "3.0 (native)".
 
   [ Guillem Jover ]
   * Verify that the alternative used in update-alternatives --set has been

man/dpkg-source.1

@@ -59,8 +59,9 @@ additional parameters might be accepted.
 that works from this ordered list:
 the format(s) indicated with the \fI\-\-format\fP command-line option(s),
 the format indicated in \fBdebian/source/format\fP,
-"1.0", "3.0 (native)". See section \fBSOURCE PACKAGE FORMATS\fP for an
-extensive description of the various source package formats.
+"1.0", "3.0 (quilt)", "3.0 (native)". See section
+\fBSOURCE PACKAGE FORMATS\fP for an extensive description of the various
+source package formats.
 
 .TP
 .RI "\fB\-\-print\-format\fP " directory

scripts/dpkg-source.pl

@@ -45,7 +45,7 @@ my $controlfile;
 my $changelogfile;
 my $changelogformat;
 
-my @build_formats = ("1.0", "3.0 (native)");
+my @build_formats = ("1.0", "3.0 (quilt)", "3.0 (native)");
 my %options = (
     # Compression related
     compression => $Dpkg::Source::Compressor::default_compression,