tools: Use hyphens instead of underscores for multi-word option names

tools/on_demand_service_tool.ad

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 13 matching lines @@
 == Synopsis
 
 [verse]
 *on_demand_service_tool* *-L* *-l* 'LABEL' ['OPTION…'] 'COMMAND' ['ARG…']
 *on_demand_service_tool* *-U* *-l* 'LABEL'
 
 == Description
 
 On-demand services may be registered with launchd(8) by using the *--load* form.
 One or more service names may be registered with the bootstrap server by
-specifying *--mach_service*. When a Mach message is sent to any of these
+specifying *--mach-service*. When a Mach message is sent to any of these
 services, launchd(8) will invoke 'COMMAND' along with any arguments specified
 ('ARG…'). 'COMMAND' must be an absolute pathname.
 
 The *--unload* form unregisters jobs registered with launchd(8).
 
 == Options
 
 *-L*, *--load*::
 Registers a job with launchd(8). *--label*='LABEL' and 'COMMAND' are required.
 This operation may also be referred to as “load” or “submit”.
 
 *-U*, *--unload*::
 Unregisters a job with launchd(8). *--label*='LABEL' is required. This operation
 may also be referred to as “unload” or “remove”.
 
 *-l*, *--label*='LABEL'::
 'LABEL' is used as the job label to identify the job to launchd(8). 'LABEL' must
 be unique within a launchd(8) context.
 
-*-m*, *--mach_service*='SERVICE'::
+*-m*, *--mach-service*='SERVICE'::
 In conjunction with *--load*, registers 'SERVICE' with the bootstrap server.
 Clients will be able to obtain a send right by looking up the 'SERVICE' name
 with the bootstrap server. When a message is sent to such a Mach port,
 launchd(8) will invoke 'COMMAND' along with any arguments specified ('ARG…') if
 it is not running. This forms the “on-demand” nature referenced by this tool’s
 name. This option may appear zero, one, or more times. 'SERVICE' must be unique
 within a bootstrap context.
 
 *--help*::
 Display help and exit.
 
 *--version*::
 Output version information and exit.
 
 == Examples
 
 Registers an on-demand server that will execute catch_exception_tool(1) when a
 Mach message is sent to a Mach port obtained from the bootstrap server by
 looking up the name +svc+:
 [subs="quotes"]
 ----
 $ *on_demand_service_tool --load --label=catch_exception \
-      --mach_service=svc \
-      $(which catch_exception_tool) --mach_service=svc \
+      --mach-service=svc \
+      $(which catch_exception_tool) --mach-service=svc \
       --file=/tmp/out --nonblocking --persistent*
 ----
 
 Unregisters the on-demand server installed above:
 [subs="quotes"]
 ----
 $ *on_demand_service_tool --unload --label=catch_exception*
 ----
 
 == Exit Status
 
 *0*::
 Success.
 
 *1*::
 Failure, with a message printed to the standard error stream.
 
 == See Also
 
 exception_port_tool(1),
 launchctl(1)
 on_demand_service_tool(1)
 
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