[META] Actually start licensing

If anyone finds this to be bad, please let me know so that I can fix
that out.

src/Signal.c

@@ -0,0 +1,74 @@
+#include <Cytoplasm/HttpServer.h>
+#include <Cytoplasm/Log.h>
+
+#include <pthread.h>
+#include <signal.h>
+
+#include <XMPP.h>
+
+static HttpServer *server = NULL;
+static pthread_t xmpp_thr;
+static XMPPComponent *jabber = NULL;
+
+static void
+SignalHandler(int signal)
+{
+    size_t i;
+    XMLElement *message, *body, *data;
+    char *from;
+
+    switch (signal)
+    {
+        case SIGPIPE:
+            return;
+        case SIGUSR1:
+            /* TODO: Soft-restart everything */
+            return;
+        case SIGTERM:
+        case SIGINT:
+            if (!server)
+            {
+                return;
+            }
+            /* Create a loopback stanza, forcing the thread to die */
+            Log(LOG_INFO, "Killing thread...");
+            XMPPKillThread(jabber, "killer");
+            pthread_join(xmpp_thr, NULL);
+            HttpServerStop(server);
+            break;
+    }
+}
+
+bool
+ParseeInitialiseSignals(HttpServer *s, pthread_t xmpp, XMPPComponent *j)
+{
+    struct sigaction sigAction;
+    bool ret = true;
+
+    server = s;
+    xmpp_thr = xmpp;
+    jabber = j;
+
+    sigAction.sa_handler = SignalHandler;
+    sigfillset(&sigAction.sa_mask);
+    sigAction.sa_flags = SA_RESTART;
+
+#define SIGACTION(sig, act, oact) \
+    if (sigaction(sig, act, oact) < 0) \
+    { \
+        Log(LOG_ERR, "Unable to install signal handler: %s", #sig); \
+        ret = false; \
+    } \
+    else \
+    { \
+        Log(LOG_DEBUG, "Installed signal handler: %s", #sig); \
+    }
+
+    SIGACTION(SIGINT, &sigAction, NULL);
+    SIGACTION(SIGTERM, &sigAction, NULL);
+    SIGACTION(SIGPIPE, &sigAction, NULL);
+    SIGACTION(SIGUSR1, &sigAction, NULL);   /* Make USR1 do a softrestart */
+#undef SIGACTION
+
+    return ret;
+}