crypto: Remove C++ comments

Prevents warnings from gcc at higher warning levels.
Signed-off-by: Jon Griffiths <jon_p_griffiths@yahoo.com>

ccan/crypto/ripemd160/ripemd160.c

@@ -282,7 +282,7 @@ static void add(struct ripemd160_ctx *ctx, const void *p, size_t len)
 	size_t bufsize = ctx->bytes % 64;
 
 	if (bufsize + len >= 64) {
-		// Fill the buffer, and process it.
+		/* Fill the buffer, and process it. */
 		memcpy(ctx->buf.u8 + bufsize, data, 64 - bufsize);
 		ctx->bytes += 64 - bufsize;
 		data += 64 - bufsize;
@@ -292,7 +292,7 @@ static void add(struct ripemd160_ctx *ctx, const void *p, size_t len)
 	}
 
 	while (len >= 64) {
-		// Process full chunks directly from the source.
+		/* Process full chunks directly from the source. */
 		if (alignment_ok(data, sizeof(uint32_t)))
 			Transform(ctx->s, (const uint32_t *)data);
 		else {
@@ -305,7 +305,7 @@ static void add(struct ripemd160_ctx *ctx, const void *p, size_t len)
 	}
 	    
 	if (len) {
-		// Fill the buffer with what remains.
+		/* Fill the buffer with what remains. */
 		memcpy(ctx->buf.u8 + bufsize, data, len);
 		ctx->bytes += len;
 	}

ccan/crypto/ripemd160/ripemd160.h

@@ -6,7 +6,7 @@
 #include <stdlib.h>
 
 /* Uncomment this to use openssl's RIPEMD160 routines (and link with -lcrypto) */
-//#define CCAN_CRYPTO_RIPEMD160_USE_OPENSSL 1
+/*#define CCAN_CRYPTO_RIPEMD160_USE_OPENSSL 1*/
 
 #ifdef CCAN_CRYPTO_RIPEMD160_USE_OPENSSL
 #include <openssl/ripemd.h>

ccan/crypto/sha256/benchmarks/double-sha-bench.c

@@ -37,7 +37,7 @@ int main(int argc, char *argv[])
 	memset(&block, 0, sizeof(block));
 	sha256(&block.h, &n, sizeof(n));
 	block.u8[sizeof(block.h)] = 0x80;
-	// Size is 256 bits
+	/* Size is 256 bits */
 	block.u8[sizeof(block)-2] = 1;
 
 	start = time_now();

ccan/crypto/sha256/sha256.c

@@ -181,7 +181,7 @@ static void add(struct sha256_ctx *ctx, const void *p, size_t len)
 	size_t bufsize = ctx->bytes % 64;
 
 	if (bufsize + len >= 64) {
-		// Fill the buffer, and process it.
+		/* Fill the buffer, and process it. */
 		memcpy(ctx->buf.u8 + bufsize, data, 64 - bufsize);
 		ctx->bytes += 64 - bufsize;
 		data += 64 - bufsize;
@@ -191,7 +191,7 @@ static void add(struct sha256_ctx *ctx, const void *p, size_t len)
 	}
 
 	while (len >= 64) {
-		// Process full chunks directly from the source.
+		/* Process full chunks directly from the source. */
 		if (alignment_ok(data, sizeof(uint32_t)))
 			Transform(ctx->s, (const uint32_t *)data);
 		else {
@@ -204,7 +204,7 @@ static void add(struct sha256_ctx *ctx, const void *p, size_t len)
 	}
 	    
 	if (len) {
-		// Fill the buffer with what remains.
+		/* Fill the buffer with what remains. */
 		memcpy(ctx->buf.u8 + bufsize, data, len);
 		ctx->bytes += len;
 	}

ccan/crypto/sha256/sha256.h

@@ -6,7 +6,7 @@
 #include <stdlib.h>
 
 /* Uncomment this to use openssl's SHA256 routines (and link with -lcrypto) */
-//#define CCAN_CRYPTO_SHA256_USE_OPENSSL 1
+/*#define CCAN_CRYPTO_SHA256_USE_OPENSSL 1*/
 
 #ifdef CCAN_CRYPTO_SHA256_USE_OPENSSL
 #include <openssl/sha.h>