Resolve several travis-ci issues

MBEDTLS_VERSION, OPENSSL_VERSION were defined twice - in both
.travis.yml  and .travis/build-deps.sh files, the last one
defined OPENSSL_VERSION via nonexistent OPENSSL_VERION
variable, which lead us to use openssl-1.0.1 instead of
openssl-1.0.2, I removed variable definition from build-deps.sh

"cache: [ apt: true ]" is not a travis supported option, it was
introduced by mistake, I removed it

LD_LIBRARY_PATH was defined for the entire test run, it includes
custom openssl build, which was picked by "wget", so "wget"
could not verify SSL cert at https://www.openssl.org sometimes.
We do not want wget to pick our custom LD_LIBRARY_PATH, so I moved
that variable to "script" section

LD_LIBRARY_PATH was defined for both linux and osx environments,
for the second DYLD_LIBRARY_PATH must be defined instead

v2: Upgrade openssl, mbedtls to the most recent versions
v3: DYLD_LIBRARY_PATH was defined via LD_LIBRARY_PATH by mistake

Acked-by: Selva Nair <selva.nair@gmail.com>
Message-Id: <1485673091-7600-1-git-send-email-chipitsine@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg13983.html
Signed-off-by: David Sommerseth <davids@openvpn.net>

.travis.yml

@@ -12,13 +12,12 @@ env:
   global:
     - JOBS=3
     - PREFIX="${HOME}/opt"
-    - MBEDTLS_VERSION="2.2.1"
+    - MBEDTLS_VERSION="2.4.0"
     - MBEDTLS_CFLAGS="-I${PREFIX}/include"
     - MBEDTLS_LIBS="-L${PREFIX}/lib -lmbedtls -lmbedx509 -lmbedcrypto"
-    - OPENSSL_VERSION="1.0.1t"
+    - OPENSSL_VERSION="1.0.2k"
     - OPENSSL_CFLAGS="-I${PREFIX}/include"
     - OPENSSL_LIBS="-L${PREFIX}/lib -lssl -lcrypto"
-    - LD_LIBRARY_PATH="${PREFIX}/lib:${LD_LIBRARY_PATH}"
 
 matrix:
   include:
@@ -63,7 +62,6 @@ addons:
       - linux-libc-dev
 
 cache:
-  apt: true
   ccache: true
   directories:
   - download-cache
@@ -77,6 +75,8 @@ install:
   - .travis/build-deps.sh > build-deps.log 2>&1 || (cat build-deps.log && exit 1)
 
 script:
+  - if [ "${TRAVIS_OS_NAME}" = "linux" ]; then export LD_LIBRARY_PATH="${PREFIX}/lib:${LD_LIBRARY_PATH}"; fi
+  - if [ "${TRAVIS_OS_NAME}" = "osx"   ]; then export DYLD_LIBRARY_PATH="${PREFIX}/lib:${DYLD_LIBRARY_PATH}"; fi
   - autoreconf -vi
   - ./configure --with-crypto-library="${SSLLIB}" ${EXTRA_CONFIG} || (cat config.log && exit 1)
   - make -j$JOBS

.travis/build-deps.sh

@@ -2,8 +2,6 @@
 set -eux
 
 # Set defaults
-MBEDTLS_VERSION="${MBEDTLS_VERSION:-2.2.1}"
-OPENSSL_VERSION="${OPENSSL_VERION:-1.0.2h}"
 PREFIX="${PREFIX:-${HOME}/opt}"
 
 download_mbedtls () {