libarchive: FEATURE_LZMA_FAST should be visible if FEATURE_SEAMLESS_LZMA

While at it, tweak some config help texts.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

archival/Config.src

@@ -27,4 +27,12 @@ config FEATURE_SEAMLESS_Z
 
 INSERT
 
+config FEATURE_LZMA_FAST
+	bool "Optimize lzma for speed"
+	default n
+	depends on UNLZMA || LZCAT || LZMA || FEATURE_SEAMLESS_LZMA
+	help
+	  This option reduces decompression time by about 25% at the cost of
+	  a 1K bigger binary.
+
 endmenu

archival/ar.c

@@ -25,8 +25,6 @@
 //config:	  extract contents from archives. In practice, it is used exclusively
 //config:	  for object module archives used by compilers.
 //config:
-//config:	  On an x86 system, the ar applet adds about 1K.
-//config:
 //config:	  Unless you have a specific application which requires ar, you should
 //config:	  probably say N here: most compilers come with their own ar utility.
 //config:

archival/bbunzip.c

@@ -501,20 +501,11 @@ int bunzip2_main(int argc UNUSED_PARAM, char **argv)
 //config:	  is generally considerably better than that achieved by the bzip2
 //config:	  compressors.
 //config:
-//config:	  The BusyBox unlzma applet is limited to decompression only.
-//config:	  On an x86 system, this applet adds about 4K.
-//config:
 //config:config LZCAT
 //config:	bool "lzcat (8.5 kb)"
 //config:	default y
 //config:	help
-//config:	  unlzma is a compression utility using the Lempel-Ziv-Markov chain
-//config:	  compression algorithm, and range coding. Compression
-//config:	  is generally considerably better than that achieved by the bzip2
-//config:	  compressors.
-//config:
-//config:	  The BusyBox unlzma applet is limited to decompression only.
-//config:	  On an x86 system, this applet adds about 4K.
+//config:	  Alias to "unlzma -c".
 //config:
 //config:config LZMA
 //config:	bool "lzma -d"
@@ -522,14 +513,6 @@ int bunzip2_main(int argc UNUSED_PARAM, char **argv)
 //config:	help
 //config:	  Enable this option if you want commands like "lzma -d" to work.
 //config:	  IOW: you'll get lzma applet, but it will always require -d option.
-//config:
-//config:config FEATURE_LZMA_FAST
-//config:	bool "Optimize for speed"
-//config:	default n
-//config:	depends on UNLZMA || LZCAT || LZMA
-//config:	help
-//config:	  This option reduces decompression time by about 25% at the cost of
-//config:	  a 1K bigger binary.
 
 //applet:IF_UNLZMA(APPLET(unlzma, BB_DIR_USR_BIN, BB_SUID_DROP))
 //                APPLET_ODDNAME:name   main    location        suid_type     help

archival/lzop.c

@@ -41,7 +41,7 @@
 //config:	bool "lzopcat (13 kb)"
 //config:	default n  # INCOMPAT: upstream lzop does not provide such tool
 //config:	help
-//config:	  Alias to "unlzop -c".
+//config:	  Alias to "lzop -dc".
 //config:
 //config:config LZOP_COMPR_HIGH
 //config:	bool "lzop compression levels 7,8,9 (not very useful)"