Add support for Solaris

src/include/compat/endian.h

 #	define __BIG_ENDIAN    BIG_ENDIAN
 #	define __LITTLE_ENDIAN LITTLE_ENDIAN
 #	define __PDP_ENDIAN    PDP_ENDIAN
+#elif defined(__sun) && defined(__SVR4) /* Solaris */
+#   include <sys/byteorder.h>
+
+#   define htobe16(x) BE_16(x)
+#   define htole16(x) LE_16(x)
+#   define be16toh(x) BE_16(x)
+#   define le16toh(x) LE_16(x)
+
+#   define htobe32(x) BE_32(x)
+#   define htole32(x) LE_32(x)
+#   define be32toh(x) BE_32(x)
+#   define le32toh(x) LE_32(x)
+
+#   define htobe64(x) BE_64(x)
+#   define htole64(x) LE_64(x)
+#   define be64toh(x) BE_64(x)
+#   define le64toh(x) LE_64(x)
 #else
 #	error platform not supported
 #endif