Clean up some NonPosix.h stuff so we can build on Linux.

It appears that SOCK_NONBLOCK is not actually POSIX. According to the
OpenBSD man page, it will be soon, and according to the Linux man page,
it is a Linux extension. However, fcntl() with O_NONBLOCK seems to be
portable across both systems.

src/HttpServer.c

@@ -41,6 +41,7 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
+#include <fcntl.h>
 
 struct HttpServer
 {
@@ -310,13 +311,18 @@ HttpServerCreate(unsigned short port, unsigned int nThreads, unsigned int maxCon
         goto error;
     }
 
-    server->sd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
+    server->sd = socket(AF_INET, SOCK_STREAM, 0);
 
     if (server->sd < 0)
     {
         goto error;
     }
 
+    if (fcntl(server->sd, F_SETFL, O_NONBLOCK) == -1)
+    {
+        goto error;
+    }
+
     sa.sin_family = AF_INET;
     sa.sin_port = htons(port);
     sa.sin_addr.s_addr = htonl(INADDR_ANY);

src/Log.c

@@ -23,6 +23,7 @@
  */
 #include <Log.h>
 
+#include <NonPosix.h>
 #include <Memory.h>
 
 #include <string.h>

src/include/NonPosix.h

@@ -30,6 +30,8 @@
 #ifndef TELODENDRIA_NONPOSIX_H
 #define TELODENDRIA_NONPOSIX_H
 
+#include <stdarg.h>
+
 /*
  * Pretty much all Unix-like systems have a chroot() function. In fact,
  * chroot() used to be POSIX, so any operating system claiming to be
@@ -40,6 +42,12 @@
  */
 extern int chroot(const char *);
 
+/*
+ * Pretty much every syslog interface has a vsyslog(). Unfortuntately,
+ * it is not POSIX.
+ */
+extern void vsyslog(int, const char *, va_list);
+
 /*
  * Telodendria is primarily developed on OpenBSD; as such, you can
  * expect that it will use some OpenBSD-specific features if OpenBSD
@@ -53,16 +61,6 @@ extern int chroot(const char *);
 #ifdef __OpenBSD__
 extern int pledge(const char *, const char *);
 extern int unveil(const char *, const char *);
-
-/*
- * OpenBSD requires that _BSD_SOURCE be set to use SOCK_NONBLOCK for
- * some reason, even though from everything I can tell, SOCK_NONBLOCK
- * is POSIX.
- */
-#ifndef _BSD_SOURCE
-#define _BSD_SOURCE
-#endif
-
 #endif
 
 #endif