static void flush_buffer(char* buf, size_t* len, CONNECTION* conn);
static int msg_fetch_header (CONTEXT* ctx, IMAP_HEADER* h, char* buf,
FILE* fp);
static void flush_buffer(char* buf, size_t* len, CONNECTION* conn);
static int msg_fetch_header (CONTEXT* ctx, IMAP_HEADER* h, char* buf,
FILE* fp);