doc: killSignal option accepts integer values

`killSignal` option accepts the signal name or signal number as well.

PR-URL: #10424
Reviewed-By: Julian Duque <julianduquej@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>

doc/api/child_process.md

@@ -137,7 +137,7 @@ added: v0.1.90
   * `timeout` {Number} (Default: `0`)
   * [`maxBuffer`][] {Number} largest amount of data (in bytes) allowed on
     stdout or stderr - if exceeded child process is killed (Default: `200*1024`)
-  * `killSignal` {String} (Default: `'SIGTERM'`)
+  * `killSignal` {String|Integer} (Default: `'SIGTERM'`)
   * `uid` {Number} Sets the user identity of the process. (See setuid(2).)
   * `gid` {Number} Sets the group identity of the process. (See setgid(2).)
 * `callback` {Function} called with the output when process terminates
@@ -214,7 +214,7 @@ added: v0.1.91
   * `timeout` {Number} (Default: `0`)
   * [`maxBuffer`][] {Number} largest amount of data (in bytes) allowed on
     stdout or stderr - if exceeded child process is killed (Default: `200*1024`)
-  * `killSignal` {String} (Default: `'SIGTERM'`)
+  * `killSignal` {String|Integer} (Default: `'SIGTERM'`)
   * `uid` {Number} Sets the user identity of the process. (See setuid(2).)
   * `gid` {Number} Sets the group identity of the process. (See setgid(2).)
 * `callback` {Function} called with the output when process terminates
@@ -591,8 +591,8 @@ added: v0.11.12
   * `gid` {Number} Sets the group identity of the process. (See setgid(2).)
   * `timeout` {Number} In milliseconds the maximum amount of time the process
     is allowed to run. (Default: `undefined`)
-  * `killSignal` {String} The signal value to be used when the spawned process
-    will be killed. (Default: `'SIGTERM'`)
+  * `killSignal` {String|Integer} The signal value to be used when the spawned
+    process will be killed. (Default: `'SIGTERM'`)
   * [`maxBuffer`][] {Number} largest amount of data (in bytes) allowed on
     stdout or stderr - if exceeded child process is killed
   * `encoding` {String} The encoding used for all stdio inputs and outputs. (Default: `'buffer'`)
@@ -633,8 +633,8 @@ added: v0.11.12
   * `gid` {Number} Sets the group identity of the process. (See setgid(2).)
   * `timeout` {Number} In milliseconds the maximum amount of time the process
     is allowed to run. (Default: `undefined`)
-  * `killSignal` {String} The signal value to be used when the spawned process
-    will be killed. (Default: `'SIGTERM'`)
+  * `killSignal` {String|Integer} The signal value to be used when the spawned
+    process will be killed. (Default: `'SIGTERM'`)
   * [`maxBuffer`][] {Number} largest amount of data (in bytes) allowed on
     stdout or stderr - if exceeded child process is killed
   * `encoding` {String} The encoding used for all stdio inputs and outputs.
@@ -675,8 +675,8 @@ added: v0.11.12
   * `gid` {Number} Sets the group identity of the process. (See setgid(2).)
   * `timeout` {Number} In milliseconds the maximum amount of time the process
     is allowed to run. (Default: `undefined`)
-  * `killSignal` {String} The signal value to be used when the spawned process
-    will be killed. (Default: `'SIGTERM'`)
+  * `killSignal` {String|Integer} The signal value to be used when the spawned
+    process will be killed. (Default: `'SIGTERM'`)
   * [`maxBuffer`][] {Number} largest amount of data (in bytes) allowed on
     stdout or stderr - if exceeded child process is killed
   * `encoding` {String} The encoding used for all stdio inputs and outputs.