Convert all uses automatically, via these two commands:
git grep -l '\<exit *(1)' \
  | grep -vEf .x-sc_prohibit_magic_number_exit \
  | xargs --no-run-if-empty \
    perl -pi -e 's/\b(exit ?)\(1\)/$1(EXIT_FAILURE)/'
git grep -l '\<exit *(0)' \
  | grep -vEf .x-sc_prohibit_magic_number_exit \
  | xargs --no-run-if-empty \
  perl -pi -e 's/\b(exit ?)\(0\)/$1(EXIT_SUCCESS)/'
* .x-sc_prohibit_magic_number_exit: New file.

Edit (RWMJ): Don't change Java code.

This change adds an explicit dependency on generator.ml for every file it
generates, except java files. Java is left for another time because it's
considerably trickier.

It also adds a build rule for src/libguestfs.la so it can be rebuilt as required
from other directories.

It does this by creating a top level make file, subdir-rules.mk, which can be
included from sub-directories. sub-directories need to define 'generator_built'
to include local files which are built by generator.ml, and they will be updated
automatically.

This fixes parallel make, and will automatically re-create generated files when
make is run from any directory.

It also fixes the problem which efad4f53 was targetting. Specifically,
src/guestfs_protocol.(c|h) had an erroneous dependency on stamp-generator, and
therefore generator.ml, despite not being directly created by it. This caused
them to be recreated every time generator.ml ran rather than only when
src/guestfs_protocol.x was updated, which cascaded into a daemon and therefore
appliance update.

This patch also changes the contents of the distribution tarball by including
files created by rpcgen.

git grep -l 'strcmp *([^=]*== *0'|xargs \
  perl -pi -e 's/\bstrcmp( *\(.*?\)) *== *0/STREQ$1/g'

git grep -l 'strncmp *([^=]*== *0'|xargs \
  perl -pi -e 's/\bstrncmp( *\(.*?\)) *== *0\b/STREQLEN$1/g'

git grep -l 'strncmp *([^=]*!= *0'|xargs \
  perl -pi -e 's/\bstrncmp( *\(.*?\)) *!= *0/STRNEQLEN$1/g'

Since this program is just an example, it shouldn't require
the Gnulib c-ctype functions.

* cfg.mk (disable_temporarily): Don't disable sc_avoid_ctype_macros.
* fish/tilde.c: Remove unnecessary inclusion of ctype.h.
* bootstrap: Add gnulib's c-ctype module to the list.
* daemon/m4/gnulib-cache.m4: Likewise.
* daemon/ext2.c: Include "c-ctype.h", not <ctype.h>.
Use c_isspace, etc, rather than isspace.
* daemon/guestfsd.c: Likewise.
* daemon/lvm.c: Likewise.
* daemon/proto.c: Likewise.
* fish/fish.c: Likewise.
* fish/tilde.c: Likewise.
* src/generator.ml: Likewise.
* src/guestfs.c: Likewise.
* examples/to-xml.c: Likewise.
* examples/Makefile.am (to_xml_CPPFLAGS): Add -I$(top_srcdir)/gnulib/lib
so inclusion of "c-ctype.h" works.
(to_xml_CPPFLAGS): Rename from to_xml_CFLAGS.

This commit changes guestfs_launch so that it both launches
the appliance and waits until it is ready (ie. the daemon communicates
back to us).

Since we removed the pretence that we could implement a low-level
asynchronous API, the need to call launch() followed by wait_ready()
has looked a bit silly.

Now guestfs_wait_ready() is basically a no-op.  It is left in the
API for backwards compatibility.  Any calls to guestfs_wait_ready()
can be removed from client code.

Do it by running this command:
[exempted files are matched via .x-sc_TAB_in_indentation]

  git ls-files \
    | pcregrep -vf .x-sc_TAB_in_indentation \
    | xargs pcregrep -l '^ *\t' \
    | xargs perl -MText::Tabs -ni -le \
      '$m=/^( *\t[ \t]*)(.*)/; print $m ? expand($1) . $2 : $_'