RFC scripts: warn about invalid MAINTAINER patterns

This series attempts to fix all stale MAINTAINER file "F" and "X" patterns.

First patch adds an option "checks" to get_maintainer.pl which outputs warnings for any "F" or "X" pattern found in MAINTAINER file which does not register any file/directory matches known by git in current worktree.

Originally, I wrote a standalone script "check_maintainer", but as this duplicated some of the functions found in get_maintainer.pl it seemed to make more sense to change get_maintainer.pl directly.

The "-x|--checks" option is intended to be used as follows:

./scripts/get_maintainer.pl -x ./ | tee out.txt

./MAINTAINERS:1743      warning: no matches     drivers/.*/pm8...-.*    F:      drivers/*/pm8???-*
./MAINTAINERS:8721      warning: no matches     drivers/net/ethernet/mellanox/mlx5/core/en_ipsec/.*     F:      drivers/net/ethernet/mellanox/mlx5/core/en_ipsec/*
./MAINTAINERS:8722      warning: no matches     drivers/net/ethernet/mellanox/mlx5/core/ipsec.* F:      drivers/net/ethernet/mellanox/mlx5/core/ipsec*
./MAINTAINERS:9431      warning: no matches     net/core/flow\.c        F:      net/core/flow.c

The output format lends itself to the following in vim (note tab character):
set errorformat=%f:%l\ %m
cfile out.txt
copen

Second patch fixes all MAINTAINER warnings but four (those listed above), which were not obvious to me how to fix. Most fixes were obvious, requiring only "ls ./**/*pat*" or "git log --follow -- xyz.c" or "git blame MAINTAINERS" to figure out what needed to be changed.

Patches are independent, however I did employ the first in figuring out the second.

Looking for input on how best to get these merged. Some of these have been broken for a long time - so stable kernels might benefit from backporting.

Future enhancements could sanity check all the other entry types found in MAINTAINER file.

--Tom

Tom Saeger (2):
scripts: warn about invalid MAINTAINER patterns
MAINTAINERS: various pattern fixes for mv/rm/typos

 MAINTAINERS               | 107 ++++++++++++++++++----------------------------
 scripts/get_maintainer.pl |  65 ++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+), 65 deletions(-)

2.14.3