Allow the 'QtPrinter' header to be found, as described
at <https://github.com/LuminanceHDR/LuminanceHDR/issues/11>.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fbad8a2..8379c8a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,6 +29,7 @@ find_package(Qt5Xml)
 find_package(Qt5Sql)
 find_package(Qt5Network)
 find_package(Qt5LinguistTools)
+find_package(Qt5PrintSupport REQUIRED)
 IF(WIN32)
 	find_package(Qt5WinExtras)
 ENDIF()
diff --git a/src/HelpBrowser/CMakeLists.txt b/src/HelpBrowser/CMakeLists.txt
index 04319a8..5537dae 100644
--- a/src/HelpBrowser/CMakeLists.txt
+++ b/src/HelpBrowser/CMakeLists.txt
@@ -29,7 +29,7 @@ QT5_WRAP_UI(FILES_UI_H ${FILES_UI})
 
 
 ADD_LIBRARY(helpbrowser ${FILES_H} ${FILES_CPP} ${FILES_MOC} ${FILES_UI_H} ${FILES_HXX})
-qt5_use_modules(helpbrowser Core Concurrent Gui Widgets Xml WebKit WebKitWidgets)
+qt5_use_modules(helpbrowser Core Concurrent Gui Widgets Xml WebKit WebKitWidgets PrintSupport)
 
 SET(FILES_TO_TRANSLATE ${FILES_TO_TRANSLATE} ${FILES_CPP} ${FILES_H} ${FILES_UI} ${FILES_HXX} PARENT_SCOPE)
 SET(LUMINANCE_MODULES_GUI ${LUMINANCE_MODULES_GUI} helpbrowser PARENT_SCOPE)
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<div class='path'>path: <a href='/guix/log/?id=7eb9176a6e5b116bc244a08ddd72d15cfeeb3ba0'>root</a>/<a href='/guix/log/gnu?id=7eb9176a6e5b116bc244a08ddd72d15cfeeb3ba0'>gnu</a>/<a href='/guix/log/gnu/packages?id=7eb9176a6e5b116bc244a08ddd72d15cfeeb3ba0'>packages</a>/<a href='/guix/log/gnu/packages/cluster.scm?id=7eb9176a6e5b116bc244a08ddd72d15cfeeb3ba0'>cluster.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/cluster.scm?id=7eb9176a6e5b116bc244a08ddd72d15cfeeb3ba0&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-12-05 14:40:07 +0100'>2021-12-05</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=e166e6acf672d0350e16f47996b5157531e72ef5'>gnu: drbd-utils: Update to 9.19.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (drbd-utils): Update to 9.19.1.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-10-11 18:59:44 +0200'>2021-10-11</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=9015a9a906f487bdedcbe028be023e8bee611c5a'>gnu: drbd-utils: Update to 9.19.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (drbd-utils): Update to 9.19.0.
[source](uri): Update for new download location.
[source](snippet): Adjust faulty substitution.
[arguments]: Add #:make-flags.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-09-28 15:43:00 +0200'>2021-09-28</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=15daaaff80db2164fb68ce67ae0670c10825bd00'>gnu: libdqlite: Update to 1.9.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (libdqlite): Update to 1.9.0.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Andrew Whatson</td></tr>
<tr><td><span title='2021-09-28 15:43:00 +0200'>2021-09-28</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=5c3f764aafda96ad9b8f8e3aca7cd6f66c519486'>gnu: libraft: Update to 0.11.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (libraft): Update to 0.11.2.
[inputs]: Add lz4.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Andrew Whatson</td></tr>
<tr><td><span title='2021-06-05 23:39:29 +0200'>2021-06-05</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=08b55f14435fa04e7c21c066ed35d9494deccaa9'>gnu: Add libdqlite.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (libdqlite): New Variable.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Dion Mendel</td></tr>
<tr><td><span title='2021-05-28 11:36:03 +0200'>2021-05-28</span></td><td><a href='/guix/commit/gnu/packages/cluster.scm?id=a800224260b5c005307fce6c0c3d85a2ea3095dd'>gnu: libraft: Update to 0.10.1</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cluster.scm (libraft): Update to 0.10.1

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Dion Mendel</td></tr>