Fixed loot_masterlist_update errors on Linux.

It was due to a lack of OpenSSL support in the libgit2 being built,
which also needs the threading system to be initialised, even if
threading support was not built...

.travis.yml

@@ -6,9 +6,10 @@ cache: apt
 
 before_install:
   # Need Boost 1.54+, which isn't in the 12.04 repositories - install from a PPA.
+  # Also need the OpenSSL dev package, for git clone from HTTPS URLs support.
   - sudo add-apt-repository ppa:boost-latest/ppa -y
   - sudo apt-get update -qq
-  - sudo apt-get install libboost-log1.55-dev libboost-date-time1.55-dev libboost-thread1.55-dev libboost-filesystem1.55-dev libboost-locale1.55-dev libboost-iostreams1.55-dev
+  - sudo apt-get install libboost-log1.55-dev libboost-date-time1.55-dev libboost-thread1.55-dev libboost-filesystem1.55-dev libboost-locale1.55-dev libboost-iostreams1.55-dev libssl-dev
 
 install:
   # Currently inside the cloned repo path.

src/backend/git.cpp

@@ -40,7 +40,6 @@ namespace fs = boost::filesystem;
 namespace lc = boost::locale;
 
 namespace loot {
-
     // Removes the read-only flag from some files in git repositories created by libgit2.
     void FixRepoPermissions(const fs::path& path) {
         BOOST_LOG_TRIVIAL(trace) << "Recursively setting write permission on directory: " << path;
@@ -65,7 +64,10 @@ namespace loot {
             merge_head(nullptr),
             tree(nullptr),
             diff(nullptr),
-            buf({0}) {}
+            buf({0}) {
+            // Init threading system and OpenSSL (for Linux builds).
+            git_threads_init();
+        }
 
         ~git_handler() {
             string path;
@@ -80,6 +82,8 @@ namespace loot {
                 }
                 catch (exception&) {}
             }
+
+            git_threads_shutdown();
         }
 
         void free() {