Via la branche testing (attention vous passez en libc6 testing):
#apt-get install libgnutls26
libc6-i686 2.7-16 [1265kB]
libapache2-mod-gnutls 0.5.1-1 [29,2kB]
tzdata 2008h-2 [742kB]
libc6 2.7-16 [4438kB]
libgcrypt11 1.4.1-1 [242kB]
locales 2.7-16 [4491kB]
libgnutls26 2.4.2-1 [456kB]
Récupération des sources du module GnuTLS et installation des librairies de développement Apache
#wget http://www.outoforder.cc/downloads/mod_gnutls/mod_gnutls-0.5.3.tar.bz2

#bzip2 -d mod_gnutls-0.5.3.tar.bz2

#tar xvf mod_gnutls-0.5.3.tar

#cd mod_gnutls-0.5.3

#apt-get install apache2-prefork-dev libgnutls-dev
Compilation du module GnuTLS pour Apache2
#./configure --with-apxs=/usr/bin/apxs2 --with-libgnutls=/usr

configure: creating config.nice
checking whether to enable maintainer-specific portions of Makefiles... no
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for a sed that does not truncate output... /bin/sed
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for /usr/bin/ld option to reload object files... -r
checking for BSD-compatible nm... /usr/bin/nm -B
checking whether ln -s works... yes
checking how to recognize dependent libraries... pass_all
checking how to run the C preprocessor... gcc -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking dlfcn.h usability... yes
checking dlfcn.h presence... yes
checking for dlfcn.h... yes
checking for g++... no
checking for c++... no
checking for gpp... no
checking for aCC... no
checking for CC... no
checking for cxx... no
checking for cc++... no
checking for cl.exe... no
checking for FCC... no
checking for KCC... no
checking for RCC... no
checking for xlC_r... no
checking for xlC... no
checking whether we are using the GNU C++ compiler... no
checking whether g++ accepts -g... no
checking dependency style of g++... none
checking for g77... no
checking for xlf... no
checking for f77... no
checking for frt... no
checking for pgf77... no
checking for cf77... no
checking for fort77... no
checking for fl32... no
checking for af77... no
checking for xlf90... no
checking for f90... no
checking for pgf90... no
checking for pghpf... no
checking for epcf90... no
checking for gfortran... no
checking for g95... no
checking for xlf95... no
checking for f95... no
checking for fort... no
checking for ifort... no
checking for ifc... no
checking for efc... no
checking for pgf95... no
checking for lf95... no
checking for ftn... no
checking whether we are using the GNU Fortran 77 compiler... no
checking whether  accepts -g... no
checking the maximum length of command line arguments... 98304
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for objdir... .libs
checking for ar... ar
checking for ranlib... ranlib
checking for strip... strip
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC
checking if gcc PIC flag -fPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
configure: creating libtool
appending configuration tag "CXX" to libtool
appending configuration tag "F77" to libtool
checking for Apache 2.0 version >= 2.0.40... yes
checking whether DEFAULT_EXP_LIBEXECDIR is declared... no
checking for libgnutls-config... /usr/bin/libgnutls-config
checking for libgnutls - version >= 2.4.0... yes
checking whether to enable SRP functionality... yes
checking dynamic linker characteristics... GNU/Linux ld.so
(cached) (cached) checking for apr_memcache_create in -lapr_memcache... no
configure: *** memcache library not found.
configure: creating ./config.status
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating include/mod_gnutls.h
config.status: creating include/mod_gnutls_config.h
config.status: executing depfiles commands
---
Configuration summary for mod_gnutls:

   * mod_gnutls version:        0.5.3
   * Apache Modules directory:  /usr/lib/apache2/modules
   * GnuTLS Library version:    2.4.2
   * SRP Authentication:          yes

---

#make
#make install

Activation du module GnuTLS pour Apache et configuration de celui-ci:
#a2enmod gnutls
Ajouter à votre fichier de configuration APACHE:
GnuTLSEnable on
GnuTLSCertificateFile /etc/apache2/certificats/votre-certificat.crt 
GnuTLSKeyFile /etc/apache2/certificats/votre-certificat.key 
GnuTLSPriorities NORMAL:+COMP-DEFLATE
Tester votre config:
#apache2 -t
Pour désinstallation des paquets nécessaire à la compilation
#apt-get remove --purge apache2-prefork-dev comerr-dev libapr1-dev libaprutil1-dev libdb4.4-dev libexpat1-dev libkadm55 libkrb5-dev libldap2-dev libpcre3-dev libpcrecpp0 libpq-dev libsqlite3-dev libssl-dev uuid-dev zlib1g-dev

#apt-get remove --purge libgcrypt11-dev libgnutls-dev libgpg-error-dev liblzo-dev libopencdk8-dev libpopt-dev libtasn1-3-dev