Log message:
Add "gettext" to USE_TOOLS only if "nls" option is enabled

Log message:
Add build option "nls" enabled by default

Log message:
Mass-change BUILD_DEPENDS to TOOL_DEPENDS outside mk/.

Almost all uses, if not all of them, are wrong, according to the
semantics of BUILD_DEPENDS (packages built for target available for
use _by_ tools at build-time) and TOOL_DEPEPNDS (packages built for
host available for use _as_ tools at build-time).

No change to BUILD_DEPENDS as used correctly inside buildlink3.

As proposed on tech-pkg:
https://mail-index.netbsd.org/tech-pkg/2023/06/03/msg027632.html

Log message:
flex: Needs c99 for stdbool.h, PR pkg/56488

Log message:
archivers: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Could not be committed due to merge conflict:
devel/py-traitlets/distinfo

The following distfiles were unfetchable (note: some may be only fetched
conditionally):

./devel/pvs/distinfo pvs-3.2-solaris.tgz
./devel/eclipse/distinfo eclipse-sourceBuild-srcIncluded-3.0.1.zip

Log message:
devel: Remove SHA1 hashes for distfiles

Log message:
flex: Remove bash dependency.

This was hidden behind a broken test section, and causing circular dependency
problems on some OS with bash -> bison -> flex -> bash.  The GNU make
requirement is still valid, but the test suite no longer requires bash.

Reported by Alver on IRC.

Log message:
Add workaround for fixing build on Linux

See https://github.com/westes/flex/issues/241
The problem is fixed in master branch and the workaround could be removed
in the next version update.

Log message:
flex: add workaround for netbsd-8 which segfaults during the build

Log message:
Update flex to 2.6.4.

Upstream news:

* Noteworthy changes in release 2.6.4 (2017-05-06) [stable]

** build

*** The indent target now knows about flex's new (as of 2.6.0)
    layout. The indent rules it would apply are not correct and do
    need to be fixed.

*** The files included in the flex distribution are now built by the
    version of flex that is included in the distribution.

*** The configure script has a better idea of which headers are
    required to build flex. It will also error when missing functions
    are detected.

*** We have lowered the versions of automake and gettext that
    configure.ac lists as required for building flex. In autogen.sh,
    we now check for how to call libtoolize and use what we find in
    the rest of the script.

*** Since files in lib/ are picked up as needed by src/, we no longer
    generate a Makefile for that directory.

*** Flex can be cross compiled.

** documentation

*** Some typos were removed from the manual.

** scanner

*** Some minor performance enhancements.

*** We honor user defined yy_* macros again. We are also more careful
    to not leak macro definitions into header files.

*** A number of portability fixes were introduced so building flex is
    more reliable on more platforms. Additionally, outdated function
    calls were removed.

*** When building the flex executable itself, %# comments from
    flex.skl are removed when generating the C source code array. This
    reduces the size of flex.

** test suite

*** All scripts in the test suite are now run by $(SHELL) and the
    needed portability fixes have been included.

*** Test suite dependencies are handled much better. This only matters
    if you are actively developing flex or its test suite.

*** Tests that depend on platform dependent features now properly skip
    when those platforms are not present.

*** When running "make check", you can now pas V=0 to silence more of
    the build. This is useful when you're less connncerned about the
    details of building and linking the test programs themselves.