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/include/netdb.h

@@ -0,0 +1,112 @@
+#ifndef _NETDB_H
+#define _NETDB_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netdb.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <inttypes.h>
+
+#define IPPORT_RESERVED 1024
+
+#define AI_PASSIVE		0x01
+#define AI_CANONNAME	0x02
+#define AI_NUMERICHOST	0x04
+#define AI_NUMERICSERV	0x08
+#define AI_V4MAPPED		0x10
+#define AI_ALL			0x20
+#define AI_ADDRCONFIG	0x40
+
+#define NI_NOFQDN		0x01
+#define NI_NUMERICHOST	0x02
+#define NI_NAMEREQD		0x04
+#define NI_NUMERICSERV	0x08
+#define NI_NUMERICSCOPE	0x10
+#define NI_DGRAM		0x20
+
+#define EAI_AGAIN		1
+#define EAI_BADFLAGS	2
+#define EAI_FAIL		3
+#define EAI_FAMILY		4
+#define EAI_MEMORY		5
+#define EAI_NONAME		6
+#define EAI_SERVICE		7
+#define EAI_SOCKTYPE	8
+#define EAI_SYSTEM		9
+#define EAI_OVERFLOW	10
+
+struct hostent
+{
+	char*	h_name;			/* Official name of the host. */
+	char**	h_aliases;		/* A pointer to an array of pointers to alternative host names, terminated by a null pointer. */
+	int		h_addrtype;		/* Address type. */
+	int		h_length;		/* The length, in bytes, of the address. */
+	char**	h_addr_list;	/* A pointer to an array of pointers to network addresses (in network byte order) for the host, terminated by a null pointer. */
+};
+
+struct netent
+{
+	char*		n_name;		/* Official, fully-qualified (including the domain) name of the host. */
+	char**		n_aliases;	/* A pointer to an array of pointers to alternative network names, terminated by a null pointer. */
+	int			n_addrtype;	/* The address type of the network. */
+	uint32_t	n_net;		/* The network number, in host byte order. */
+};
+
+struct protoent
+{
+	char*	p_name;		/* Official name of the protocol. */
+	char**	p_aliases;	/* A pointer to an array of pointers to alternative protocol names, terminated by a null pointer. */
+	int		p_proto;	/* The protocol number. */
+};
+
+struct servent
+{
+	char*	s_name;		/* Official name of the service. */
+	char**	s_aliases;	/* A pointer to an array of pointers to alternative service names, terminated by a null pointer. */
+	int		s_port;		/* A value which, when converted to uint16_t, yields the port number in network byte order at which the service resides. */
+	char*	s_proto;	/* The name of the protocol to use when contacting the service. */
+};
+
+struct addrinfo
+{
+	int					ai_flags;		/* Input flags. */
+	int					ai_family;		/* Address family of socket. */
+	int					ai_socktype;	/* Socket type. */
+	int					ai_protocol;	/* Protocol of socket. */
+	socklen_t			ai_addrlen;		/* Length of socket address. */
+	struct sockaddr*	ai_addr;		/* Socket address of socket. */
+	char*				ai_canonname;	/* Canonical name of service location. */
+	struct addrinfo*	ai_next;		/* Pointer to next in list. */
+};
+
+void				endhostent(void);
+void				endnetent(void);
+void				endprotoent(void);
+void				endservent(void);
+void				freeaddrinfo(struct addrinfo* ai);
+const char*			gai_strerror(int ecode);
+int					getaddrinfo(const char* __restrict nodename, const char* __restrict servname, const struct addrinfo* __restrict hints, struct addrinfo** __restrict res);
+struct hostent*		gethostbyname(const char* name);
+struct hostent*		gethostent(void);
+int					getnameinfo(const struct sockaddr* __restrict sa, socklen_t salen, char* __restrict node, socklen_t nodelen, char* __restrict service, socklen_t servicelen, int flags);
+struct netent*		getnetbyaddr(uint32_t net, int type);
+struct netent*		getnetbyname(const char* name);
+struct netent*		getnetent(void);
+struct protoent*	getprotobyname(const char* name);
+struct protoent*	getprotobynumber(int proto);
+struct protoent*	getprotoent(void);
+struct servent*		getservbyname(const char* name, const char* proto);
+struct servent*		getservbyport(int port, const char* proto);
+struct servent*		getservent(void);
+void				sethostent(int stayopen);
+void				setnetent(int stayopen);
+void				setprotoent(int stayopen);
+void				setservent(int stayopen);
+
+__END_DECLS
+
+#endif