More ifconfig cleanup.
uuencode tweak: output a non-whitespace character for 0 in traditional mode.
xzcat: more cleanup and some shrinking.

-drop __always_inline (c. 1.5k of binary size),
-remove the xz_dec_bcj_end and memzero macros
(memeq is left because of negative returns),
-disable XZ_DEC_SINGLE and XZ_DEC_PREALLOC, since we aren't using them.
(160 bytes)
-Merge xz_dec_lzma2_end into xz_dec_end
-Move xz_crc32 to where it's defined.
(That does not seem to be duplicated elsewhere in toybox.)
Convert tabs to spaces.
ifconfig uses __caddr_t in one location; this is not guaranteed to work everywhere. It does not compile OOB on musl, so I changed it to the portable equivalent, char *.  This compiles on musl, and should compile anywhere.
Tweak help text.
Move guts of help command into show_help() in lib/help.c, with config TOYBOX_HELP controlling infrastructure.
Add tests for find's expression parsing
Make genconfig use CFLAGS because building against a libc that isn't installed on the host may need --static to run the results.
Isaac Dunham's help string cleanup.
More ifconfig cleanup.
Fix the help commit I screwed up, and replace leading tabs with spaces.
More ifconfig cleanup.
Add -f to chmod (just turns off -v).
Another round of ifconfig cleanup.
find: Improve operator processing
Commit 818 simplified the license text in the source tarball, this gets the web copy.
ifconfig cleanup (Reorder functions to eliminate need for prototypes, put main at end).
More ifconfig cleanup.
stat: Reindent from 4 to 2 spaces