MAINTAINERS entries that aren't S: Orphan but maybe should be

[Markus Armbruster <armbru@redhat.com>]

I'm cc'ing reviewers and lists mentioned below, and frequent
contributors to MAINTAINERS.

There are a number of MAINTAINERS entries with S: other than "Orphan"
without M:

    $ awk '/^M: / { m++ } /^S: / { s=$2 } /^$/ && s { if (!m && s != "Orphan") print t; m=0; s=""; getline; t=FILENAME ":" FNR ": " $0; next }' MAINTAINERS 
    MAINTAINERS:1736: Microchip PolarFire SoC Icicle Kit
    MAINTAINERS:1792: SH4 Machines
    MAINTAINERS:2022: Machine core
    MAINTAINERS:2226: ACPI/HEST/GHES/ARM processor CPER
    MAINTAINERS:2555: vhost-user-scmi
    MAINTAINERS:2862: XIVE
    MAINTAINERS:2872: Renesas peripherals
    MAINTAINERS:3165: CheckPoint and Restart (CPR)
    MAINTAINERS:3719: Checkpatch
    MAINTAINERS:3746: RDMA Migration
    MAINTAINERS:3894: Record/replay
    MAINTAINERS:4029: OpenSBI Firmware
    MAINTAINERS:4153: SPARC TCG target
    MAINTAINERS:4233: CURL
    MAINTAINERS:4238: GLUSTER

Some of these have R:

    MAINTAINERS:1792: SH4 Machines
    R: Yoshinori Sato <yoshinori.sato@nifty.com>
    S: Odd Fixes

    MAINTAINERS:2022: Machine core
    R: Philippe Mathieu-Daudé <philmd@linaro.org>
    R: Zhao Liu <zhao1.liu@intel.com>
    S: Supported

    MAINTAINERS:2226: ACPI/HEST/GHES/ARM processor CPER
    R: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
    S: Maintained

    MAINTAINERS:2555: vhost-user-scmi
    R: Milan Zamazal <mzamazal@redhat.com>
    S: Supported

    MAINTAINERS:2862: XIVE
    R: Gautam Menghani <gautam@linux.ibm.com>
    R: Glenn Miles <milesg@linux.ibm.com>
    L: qemu-ppc@nongnu.org
    S: Odd Fixes

    MAINTAINERS:2872: Renesas peripherals
    R: Yoshinori Sato <yoshinori.sato@nifty.com>
    S: Odd Fixes

    MAINTAINERS:3165: CheckPoint and Restart (CPR)
    R: Peter Xu <peterx@redhat.com>
    R: Fabiano Rosas <farosas@suse.de>
    R: Mark Kanda <mark.kanda@oracle.com>
    R: Ben Chaney <bchaney@akamai.com>
    S: Supported

    MAINTAINERS:3746: RDMA Migration
    R: Li Zhijian <lizhijian@fujitsu.com>
    R: Peter Xu <peterx@redhat.com>
    S: Odd Fixes

    MAINTAINERS:3894: Record/replay
    R: Paolo Bonzini <pbonzini@redhat.com>
    R: Alex Bennée <alex.bennee@linaro.org>
    S: Odd Fixes

Only R: feels tolerable with S: Odd Fixes.  However, S: Supported and
S: Maintained are clearly wrong.  Unless somebody steps up to serve as
M:, we should downgrade to S: Odd Fixes.  Volunteers?

These have at least L:

    MAINTAINERS:1736: Microchip PolarFire SoC Icicle Kit
    L: qemu-riscv@nongnu.org
    S: Supported

    MAINTAINERS:4029: OpenSBI Firmware
    L: qemu-riscv@nongnu.org
    S: Supported

    MAINTAINERS:4233: CURL
    L: qemu-block@nongnu.org
    S: Odd Fixes

    MAINTAINERS:4238: GLUSTER
    L: qemu-block@nongnu.org
    L: integration@gluster.org
    S: Odd Fixes

Likewise.  Volunteers?

These have neither:

    MAINTAINERS:3719: Checkpatch
    S: Odd Fixes

    MAINTAINERS:4153: SPARC TCG target
    S: Odd Fixes

Unless somebody steps up to server as M: or at least R:, we should
downgrade to S: Orphan.  Volunteers?