change hyphens to underscores in function file names, for consistency

with function definitions themselves

diff --git a/src/subcommands/m/gen-subkey b/src/subcommands/m/gen_subkey
similarity index 100%
rename from src/subcommands/m/gen-subkey
rename to src/subcommands/m/gen_subkey

diff --git a/src/subcommands/m/import-subkey b/src/subcommands/m/import_subkey
similarity index 100%
rename from src/subcommands/m/import-subkey
rename to src/subcommands/m/import_subkey

diff --git a/src/subcommands/m/ssh-proxycommand b/src/subcommands/m/ssh_proxycommand
similarity index 100%
rename from src/subcommands/m/ssh-proxycommand
rename to src/subcommands/m/ssh_proxycommand

diff --git a/src/subcommands/m/subkey-to-ssh-agent b/src/subcommands/m/subkey_to_ssh_agent
similarity index 100%
rename from src/subcommands/m/subkey-to-ssh-agent
rename to src/subcommands/m/subkey_to_ssh_agent

diff --git a/src/subcommands/ma/add-certifier b/src/subcommands/ma/add_certifier
similarity index 100%
rename from src/subcommands/ma/add-certifier
rename to src/subcommands/ma/add_certifier

diff --git a/src/subcommands/ma/list-certifiers b/src/subcommands/ma/list_certifiers
similarity index 100%
rename from src/subcommands/ma/list-certifiers
rename to src/subcommands/ma/list_certifiers

diff --git a/src/subcommands/ma/remove-certifier b/src/subcommands/ma/remove_certifier
similarity index 100%
rename from src/subcommands/ma/remove-certifier
rename to src/subcommands/ma/remove_certifier

diff --git a/src/subcommands/ma/update-users b/src/subcommands/ma/update_users
similarity index 100%
rename from src/subcommands/ma/update-users
rename to src/subcommands/ma/update_users

diff --git a/src/subcommands/mh/add-hostname b/src/subcommands/mh/add_hostname
similarity index 100%
rename from src/subcommands/mh/add-hostname
rename to src/subcommands/mh/add_hostname

diff --git a/src/subcommands/mh/add-revoker b/src/subcommands/mh/add_revoker
similarity index 100%
rename from src/subcommands/mh/add-revoker
rename to src/subcommands/mh/add_revoker

diff --git a/src/subcommands/mh/extend-key b/src/subcommands/mh/extend_key
similarity index 100%
rename from src/subcommands/mh/extend-key
rename to src/subcommands/mh/extend_key

diff --git a/src/subcommands/mh/gen-key b/src/subcommands/mh/gen_key
similarity index 100%
rename from src/subcommands/mh/gen-key
rename to src/subcommands/mh/gen_key

diff --git a/src/subcommands/mh/import-key b/src/subcommands/mh/import_key
similarity index 100%
rename from src/subcommands/mh/import-key
rename to src/subcommands/mh/import_key

diff --git a/src/subcommands/mh/publish-key b/src/subcommands/mh/publish_key
similarity index 100%
rename from src/subcommands/mh/publish-key
rename to src/subcommands/mh/publish_key

diff --git a/src/subcommands/mh/revoke-hostname b/src/subcommands/mh/revoke_hostname
similarity index 100%
rename from src/subcommands/mh/revoke-hostname
rename to src/subcommands/mh/revoke_hostname

diff --git a/src/subcommands/mh/revoke-key b/src/subcommands/mh/revoke_key
similarity index 100%
rename from src/subcommands/mh/revoke-key
rename to src/subcommands/mh/revoke_key