Refactor and rewrite.

Perl script is removed in favour of C. Stale documentation and initfiles
are removed for now also.

C interface works, but still needs work (for example, mDNS is missing) -
see TODO.

common.h

@@ -0,0 +1,29 @@
+#ifndef _COMMON_H
+#define _COMMON_H
+
+#include <openssl/rsa.h>
+#include <stdint.h>
+#include "audio.h"
+
+typedef struct {
+    char *password;
+    char hw_addr[6];
+    int port;
+    audio_ops *output;
+    int buffer_start_fill;
+} shairport_cfg;
+
+void die(char *format, ...);
+void warn(char *format, ...);
+void debug(char *format, ...);
+
+uint8_t *base64_dec(char *input, int *outlen);
+char *base64_enc(uint8_t *input, int length);
+
+#define RSA_MODE_AUTH (0)
+#define RSA_MODE_KEY  (1)
+uint8_t *rsa_apply(uint8_t *input, int inlen, int *outlen, int mode);
+
+extern shairport_cfg config;
+
+#endif // _COMMON_H