Fix some issues reported by lintian

debian/changelog

@@ -1,3 +1,11 @@
+w3c-sgml-lib (1.3-2) UNRELEASED; urgency=medium
+
+  * Use secure URI in Vcs control header.
+  * Use secure copyright file specification URI.
+  * Trim trailing whitespace.
+
+ -- Jelmer Vernooij <jelmer@debian.org>  Mon, 01 Oct 2018 08:36:07 +0100
+
 w3c-sgml-lib (1.3-1) unstable; urgency=low
 
   * New upstream release (Closes: #665298)
@@ -18,7 +26,7 @@ w3c-sgml-lib (1.2-2) unstable; urgency=low
   * Moved to personal maintainership
   * Adopting proposals from Samuel Bronson for resolving
     conflicts with w3c-dtd-xhtml (Closes: #662091)
-    - Removing broken links 
+    - Removing broken links
     - Removed legacy support
     - Removed Provides clause for w3c-dtd-xhtml (Closes: #615125)
     - Moved directory to w3c-sgml-lib from xhtml

debian/control

@@ -6,7 +6,7 @@ Build-Depends: debhelper (>= 9.20120909), xml-core (>= 0.13+nmu2~),
  libreadonly-perl, libxml-libxml-perl, libautodie-perl
 Standards-Version: 3.9.4
 Homepage: http://validator.w3.org/sgml-lib
-Vcs-Git: git://github.com/periapt/w3c-sgml-lib.git
+Vcs-Git: https://github.com/periapt/w3c-sgml-lib.git
 Vcs-Browser: https://github.com/periapt/w3c-sgml-lib
 
 Package: w3c-sgml-lib
@@ -15,7 +15,7 @@ Depends: ${misc:Depends}
 Breaks: w3c-markup-validator (<< 1.2+dfsg-6)
 Conflicts: w3c-dtd-xhtml
 Description: w3.org DTD and catalog files
- This package consists of all the definition files used by the 
+ This package consists of all the definition files used by the
  W3C Markup Validator. It consists of DTDs and modules, entity files
  and XML and SGML catalogs. The catalogs are registered with the root
  catalogs.

debian/copyright

@@ -1,4 +1,4 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Contact: http://validator.w3.org/feedback.html
 Source: http://validator.w3.org/dist/sgml-lib.tar.gz
 Upstream-Name: W3C SGML Library