debian: split libraries out of qubes-utils package

According to Debian Policy:
https://www.debian.org/doc/debian-policy/ch-sharedlibs.html

This is the proper way to handle shared libraries (and dependencies on
them) in Debian.

Fixes QubesOS/qubes-issues#1416

debian/control

@@ -12,18 +12,55 @@ Package: qubes-utils
 Architecture: any
 Depends: qubesdb-vm, libvchan-xen, lsb-base, ${shlibs:Depends}, ${misc:Depends}
 Conflicts: qubes-linux-utils
+Breaks: qubes-core-agent (<< 3.1.4)
 Recommends: python2.7
 Description: Qubes Linux utilities
  This package includes the basic qubes utilities necessary for domU.
 
 Package: qubes-kernel-vm-support
 Architecture: any
-Depends: dkms, initramfs-tools, ${shlibs:Depends}, ${misc:Depends}
+Depends: dkms, initramfs-tools, ${misc:Depends}
 Description: Qubes VM kernel and initramfs modules
  This package contains:
- 1. mkinitramfs module required to setup Qubes VM root filesystem. This package is
+ 1. mkinitramfs module required to setup Qubes VM root filesystem. This package
- needed in VM only when the VM uses its own kernel (via pvgrub or so). Otherwise
+ is needed in VM only when the VM uses its own kernel (via pvgrub or so).
- initrd is provided by dom0.
+ Otherwise initrd is provided by dom0.
  .
  2. u2mfn kernel module sources (dkms) required by GUI agent and R2 version of
  libvchan library.
+
+Package: libqrexec-utils2
+Architecture: any
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Breaks: qubes-utils (<< 3.1.4)
+Replaces: qubes-utils (<< 3.1.4)
+Description: Library of common functions of qrexec agent and daemon
+ This library contains common helper functions for qrexec agent and daemon.
+
+Package: libqubes-rpc-filecopy2
+Architecture: any
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Breaks: qubes-utils (<< 3.1.4)
+Replaces: qubes-utils (<< 3.1.4)
+Description: Qubes file copy protocol library
+ This library can be used for both sending files using qfile protocol and for
+ receiving them.
+
+Package: libqrexec-utils-dev
+Architecture: any
+Section: libdevel
+Depends: libqrexec-utils2 (= ${binary:Version}), ${misc:Depends}
+Breaks: qubes-utils (<< 3.1.4)
+Replaces: qubes-utils (<< 3.1.4)
+Description: Development headers for libqrexec-utils
+ This package contains files required to compile qrexec-agent and qrexec-daemon.
+
+Package: libqubes-rpc-filecopy-dev
+Architecture: any
+Section: libdevel
+Depends: libqubes-rpc-filecopy2 (= ${binary:Version}), ${misc:Depends}
+Breaks: qubes-utils (<< 3.1.4)
+Replaces: qubes-utils (<< 3.1.4)
+Description: Development headers for libqrexec-utils
+ This package contains files required to compile Qubes file copy related
+ utilities like qfile-agent.

debian/libqrexec-utils-dev.install

@@ -0,0 +1,3 @@
+usr/include/libqrexec-utils.h
+usr/include/qrexec.h
+usr/lib/libqrexec-utils.so

debian/libqrexec-utils2.install

@@ -0,0 +1 @@
+usr/lib/libqrexec-utils.so.2*

debian/libqrexec-utils2.shlibs

@@ -0,0 +1 @@
+libqrexec-utils 2 libqrexec-utils2 (>= 3.1.3)

debian/libqubes-rpc-filecopy-dev.install

@@ -0,0 +1,2 @@
+usr/include/libqubes-rpc-filecopy.h
+usr/lib/libqubes-rpc-filecopy.so

debian/libqubes-rpc-filecopy2.install

@@ -0,0 +1 @@
+usr/lib/libqubes-rpc-filecopy.so.2*

debian/libqubes-rpc-filecopy2.shlibs

@@ -0,0 +1 @@
+libqubes-rpc-filecopy 2 libqubes-rpc-filecopy2 (>= 3.1.3)

debian/qubes-utils.install

@@ -1,6 +1,4 @@
 usr/sbin/meminfo-writer
 lib/systemd/system/qubes-meminfo-writer.service
 usr/lib/qubes/*
-usr/include/*
-usr/lib/*
 lib/udev/*