Update to libsodium 0.4.1.

Author: impl

.travis.yml

@@ -2,8 +2,15 @@ language: c
 before_install:
     - sudo apt-get update -qq
     - sudo apt-get install -qq check
-    - wget -q -O /tmp/libsodium.deb http://download.dnscrypt.org/libsodium/releases/libsodium_0.3+fpm0_amd64.deb
-    - sudo dpkg -i /tmp/libsodium.deb
+    - pushd /tmp
+    - wget http://download.dnscrypt.org/libsodium/releases/libsodium-0.4.1.tar.gz
+    - tar xzf libsodium-0.4.1.tar.gz
+    - pushd libsodium-0.4.1
+    - ./configure
+    - make
+    - sudo make install
+    - popd
+    - popd
 env:
     - USE_LIBGLIB=no
     - USE_LIBGLIB=yes

configure.ac

@@ -25,7 +25,7 @@ PKG_PROG_PKG_CONFIG
 # Checks for libraries.
 PKG_CHECK_MODULES([CHECK], [check >= 0.9.8])
 AC_SEARCH_LIBS([clock_gettime], [rt posix4])
-AC_CHECK_LIB([sodium], [crypto_onetimeauth_poly1305_ref], [], [AC_MSG_ERROR([missing libsodium])])
+AC_CHECK_LIB([sodium], [sodium_init], [], [AC_MSG_ERROR([missing libsodium])])
 
 AC_ARG_WITH([libglib],
     [AS_HELP_STRING([--with-libglib], [build with glib support @<:@default=check@:>@])],