liblzma: Very minor API doc tweaks.

Use "member" to refer to struct members as that's the term used
by the C standard.

Use lzma_options_delta.dist and such in docs so that in Doxygen's
HTML output they will link to the doc of the struct member.

Clean up a few trailing white spaces too.

src/liblzma/api/lzma/block.h

@@ -33,11 +33,11 @@ typedef struct {
 	 * \brief       Block format version
 	 *
 	 * To prevent API and ABI breakages when new features are needed,
-	 * a version number is used to indicate which fields in this
+	 * a version number is used to indicate which members in this
 	 * structure are in use:
 	 *   - liblzma >= 5.0.0: version = 0 is supported.
 	 *   - liblzma >= 5.1.4beta: Support for version = 1 was added,
-	 *     which adds the ignore_check field.
+	 *     which adds the ignore_check member.
 	 *
 	 * If version is greater than one, most Block related functions
 	 * will return LZMA_OPTIONS_ERROR (lzma_block_header_decode() works
@@ -286,7 +286,7 @@ typedef struct {
 	/**
 	 * \brief       A flag to Block decoder to not verify the Check field
 	 *
-	 * This field is supported by liblzma >= 5.1.4beta if .version >= 1.
+	 * This member is supported by liblzma >= 5.1.4beta if .version >= 1.
 	 *
 	 * If this is set to true, the integrity check won't be calculated
 	 * and verified. Unless you know what you are doing, you should

src/liblzma/api/lzma/delta.h

@@ -60,12 +60,12 @@ typedef struct {
 	uint32_t dist;
 
 	/**
-	 * \brief       Minimum value for the dist field in lzma_options_delta.
+	 * \brief       Minimum value for lzma_options_delta.dist.
 	 */
 #	define LZMA_DELTA_DIST_MIN 1
 
 	/**
-	 * \brief       Maximum value for the dist field in lzma_options_delta.
+	 * \brief       Maximum value for lzma_options_delta.dist.
 	 */
 #	define LZMA_DELTA_DIST_MAX 256
 

src/liblzma/api/lzma/index.h

@@ -243,13 +243,13 @@ typedef struct {
 	 * touch these in any way.
 	 */
 	union {
-		/** \private     Internal field. */
+		/** \private     Internal member. */
 		const void *p;
 
-		/** \private     Internal field. */
+		/** \private     Internal member. */
 		size_t s;
 
-		/** \private     Internal field. */
+		/** \private     Internal member. */
 		lzma_vli v;
 	} internal[6];
 } lzma_index_iter;

src/liblzma/api/lzma/stream_flags.h

@@ -37,7 +37,7 @@ typedef struct {
 	 *
 	 * To prevent API and ABI breakages if new features are needed in
 	 * Stream Header or Stream Footer, a version number is used to
-	 * indicate which fields in this structure are in use. For now,
+	 * indicate which members in this structure are in use. For now,
 	 * version must always be zero. With non-zero version, the
 	 * lzma_stream_header_encode() and lzma_stream_footer_encode()
 	 * will return LZMA_OPTIONS_ERROR.
@@ -70,12 +70,12 @@ typedef struct {
 	lzma_vli backward_size;
 
 	/**
-	 * \brief       Minimum size of the backward_size member
+	 * \brief       Minimum value for lzma_stream_flags.backward_size
 	 */
 #	define LZMA_BACKWARD_SIZE_MIN 4
 
 	/**
-	 * \brief       Maximum size of the backward_size member
+	 * \brief       Maximum value for lzma_stream_flags.backward_size
 	 */
 #	define LZMA_BACKWARD_SIZE_MAX (LZMA_VLI_C(1) << 34)