src/doc: improve man page and --help

- add missing environment variables to --help
- add missing flags to man page
- sort environment variables alphabetically
- add some highlighting to the man page
- remove stops from descriptions in --help for consistency
- few other minor tweaks to --help

PR-URL: https://github.com/nodejs/node/pull/10157
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

doc/node.1

@@ -182,28 +182,36 @@ Specify ICU data load path. (overrides \fBNODE_ICU_DATA\fR)
 \',\'\-separated list of core modules that should print debug information.
 
 .TP
-.BR NODE_PATH =\fIpath\fR[:\fI...\fR]
+.BR NODE_DISABLE_COLORS =\fI1\fR
-\':\'\-separated list of directories prefixed to the module search path.
+When set to \fI1\fR, colors will not be used in the REPL.
 
 .TP
-.BR NODE_DISABLE_COLORS=1
+.BR NODE_EXTRA_CA_CERTS =\fIfile\fR
-When set to 1 colors will not be used in the REPL.
+When set, the well known "root" CAs (like VeriSign) will be extended with the
+extra certificates in \fIfile\fR. The file should consist of one or more
+trusted certificates in PEM format. A message will be emitted (once) with
+\fBprocess.emitWarning()\fR if the file is missing or misformatted, but any
+errors are otherwise ignored.
 
 .TP
 .BR NODE_ICU_DATA =\fIfile\fR
 Data path for ICU (Intl object) data. Will extend linked-in data when compiled
 with small\-icu support.
 
+.TP
+.BR NODE_PATH =\fIpath\fR[:\fI...\fR]
+\':\'\-separated list of directories prefixed to the module search path.
+
 .TP
 .BR NODE_REPL_HISTORY =\fIfile\fR
 Path to the file used to store the persistent REPL history. The default path
-is ~/.node_repl_history, which is overridden by this variable. Setting the
+is \fB~/.node_repl_history\fR, which is overridden by this variable. Setting the
 value to an empty string ("" or " ") disables persistent REPL history.
 
 .TP
-.BR NODE_TTY_UNSAFE_ASYNC=1
+.BR NODE_TTY_UNSAFE_ASYNC =\fI1\fR
-When set to 1, writes to stdout and stderr will be non-blocking and asynchronous
+When set to \fI1\fR, writes to stdout and stderr will be non-blocking and
-when outputting to a TTY on platforms which support async stdio.
+asynchronous when outputting to a TTY on platforms which support async stdio.
 Setting this will void any guarantee that stdio will not be interleaved or
 dropped at program exit. \fBAvoid use.\fR
 

src/node.cc

@@ -3569,8 +3569,7 @@ static void PrintHelp() {
          "  -r, --require         module to preload (option can be repeated)\n"
          "  --no-deprecation      silence deprecation warnings\n"
          "  --trace-deprecation   show stack traces on deprecations\n"
-         "  --throw-deprecation   throw an exception anytime a deprecated "
+         "  --throw-deprecation   throw an exception on deprecations\n"
-         "function is used\n"
          "  --no-warnings         silence all process warnings\n"
          "  --trace-warnings      show stack traces on process warnings\n"
          "  --trace-sync-io       show stack trace when use of sync IO\n"
@@ -3596,28 +3595,30 @@ static void PrintHelp() {
          "  --icu-data-dir=dir    set ICU data load path to dir\n"
          "                        (overrides NODE_ICU_DATA)\n"
 #if !defined(NODE_HAVE_SMALL_ICU)
-         "                        note: linked-in ICU data is\n"
+         "                        note: linked-in ICU data is present\n"
-         "                        present.\n"
 #endif
          "  --preserve-symlinks   preserve symbolic links when resolving\n"
-         "                        and caching modules.\n"
+         "                        and caching modules\n"
 #endif
          "\n"
          "Environment variables:\n"
-#ifdef _WIN32
+         "NODE_DEBUG              ','-separated list of core modules that\n"
-         "NODE_PATH                ';'-separated list of directories\n"
+         "                        should print debug information\n"
-#else
+         "NODE_DISABLE_COLORS     set to 1 to disable colors in the REPL\n"
-         "NODE_PATH                ':'-separated list of directories\n"
+         "NODE_EXTRA_CA_CERTS     path to additional CA certificates file\n"
-#endif
-         "                         prefixed to the module search path.\n"
-         "NODE_DISABLE_COLORS      set to 1 to disable colors in the REPL\n"
 #if defined(NODE_HAVE_I18N_SUPPORT)
-         "NODE_ICU_DATA            data path for ICU (Intl object) data\n"
+         "NODE_ICU_DATA           data path for ICU (Intl object) data\n"
 #if !defined(NODE_HAVE_SMALL_ICU)
-         "                         (will extend linked-in data)\n"
+         "                        (will extend linked-in data)\n"
 #endif
 #endif
-         "NODE_REPL_HISTORY        path to the persistent REPL history file\n"
+#ifdef _WIN32
+         "NODE_PATH               ';'-separated list of directories\n"
+#else
+         "NODE_PATH               ':'-separated list of directories\n"
+#endif
+         "                        prefixed to the module search path\n"
+         "NODE_REPL_HISTORY       path to the persistent REPL history file\n"
          "\n"
          "Documentation can be found at https://nodejs.org/\n");
 }