Move sodium_init() to initLibStore()

Part of an effort to make it easier to initialize the right things,
by moving code into the appropriate libraries.

src/libmain/shared.cc

@@ -28,8 +28,6 @@
 
 #include <openssl/crypto.h>
 
-#include <sodium.h>
-
 
 namespace nix {
 
@@ -164,9 +162,6 @@ void initNix()
     initLibUtil();
     initLibStore();
 
-    if (sodium_init() == -1)
-        throw Error("could not initialise libsodium");
-
     startSignalHandlerThread();
 
     /* Reset SIGCHLD to its default. */

src/libstore/globals.cc

@@ -13,6 +13,8 @@
 
 #include <nlohmann/json.hpp>
 
+#include <sodium/core.h>
+
 
 namespace nix {
 
@@ -292,6 +294,9 @@ void assertLibStoreInitialized() {
 
 void initLibStore() {
 
+    if (sodium_init() == -1)
+        throw Error("could not initialise libsodium");
+
     loadConfFile();
 
     initLibStoreDone = true;