BuildSystem: Move all userpace libraries under the userspace directory

As the number of libraries is increasing, root directory starts to
expand. This adds better organization for libraries

userspace/libraries/LibC/arpa/inet.cpp

@@ -0,0 +1,75 @@
+#include <BAN/Endianness.h>
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <stdio.h>
+
+uint32_t htonl(uint32_t hostlong)
+{
+	return BAN::host_to_network_endian(hostlong);
+}
+
+uint16_t htons(uint16_t hostshort)
+{
+	return BAN::host_to_network_endian(hostshort);
+}
+
+uint32_t ntohl(uint32_t netlong)
+{
+	return BAN::host_to_network_endian(netlong);
+}
+
+uint16_t ntohs(uint16_t netshort)
+{
+	return BAN::host_to_network_endian(netshort);
+}
+
+in_addr_t inet_addr(const char* cp)
+{
+	uint32_t a = 0, b = 0, c = 0, d = 0;
+	int ret = sscanf(cp, "%u.%u.%u.%u", &a, &b, &c, &d);
+	if (ret < 1 || ret > 4)
+		return (in_addr_t)(-1);
+	uint32_t result = 0;
+	result |= (ret == 1) ? a : a << 24;
+	result |= (ret == 2) ? b : b << 16;
+	result |= (ret == 3) ? c : c <<  8;
+	result |= (ret == 4) ? d : d <<  0;
+	return htonl(result);
+}
+
+char* inet_ntoa(struct in_addr in)
+{
+	static char buffer[16];
+	uint32_t he = ntohl(in.s_addr);
+	sprintf(buffer, "%u.%u.%u.%u",
+		(he >> 24) & 0xFF,
+		(he >> 16) & 0xFF,
+		(he >>  8) & 0xFF,
+		(he >>  0) & 0xFF
+	);
+	return buffer;
+}
+
+const char* inet_ntop(int af, const void* __restrict src, char* __restrict dst, socklen_t size)
+{
+	if (af == AF_INET)
+	{
+		if (size < INET_ADDRSTRLEN)
+		{
+			errno = ENOSPC;
+			return nullptr;
+		}
+		uint32_t he = ntohl(reinterpret_cast<const in_addr*>(src)->s_addr);
+		sprintf(dst, "%u.%u.%u.%u",
+			(he >> 24) & 0xFF,
+			(he >> 16) & 0xFF,
+			(he >>  8) & 0xFF,
+			(he >>  0) & 0xFF
+		);
+		return dst;
+	}
+
+	errno = EAFNOSUPPORT;
+	return nullptr;
+}