Replace "\--" with "--" in documentation.

"\--" in the documentation was for asciidoc, in which "--"s won't work.
Asciidoctor doesn't have such a problem and will output "\--" verbatim.

Change-Id: I41419b037a10bd830f660d7295aea0d442504229

Documentation/dev-readme.txt

@@ -61,7 +61,7 @@ testing site for development use:
 ----
 
 Accept defaults by pressing Enter until 'init' completes, or add
-the '\--batch' command line option to avoid them entirely.  It is
+the '--batch' command line option to avoid them entirely.  It is
 recommended to change the listen addresses from '*' to 'localhost' to
 prevent outside connections from contacting the development instance.
 

Documentation/pgm-LocalUsernamesToLowerCase.txt

@@ -37,11 +37,11 @@ OPTIONS
 -------
 
 -d::
-\--site-path::
+--site-path::
 	Location of the gerrit.config file, and all other per-site
 	configuration data, supporting libraries and log files.
 
-\--threads::
+--threads::
 	Number of threads to perform the scan work with.  Defaults to
 	twice the number of CPUs available.
 

Documentation/pgm-daemon.txt

@@ -10,12 +10,12 @@ SYNOPSIS
 [verse]
 'java' -jar gerrit.war 'daemon'
 	-d <SITE_PATH>
-	[\--enable-httpd | \--disable-httpd]
-	[\--enable-sshd | \--disable-sshd]
-	[\--console-log]
-	[\--slave]
-	[\--headless]
-	[\--init]
+	[--enable-httpd | --disable-httpd]
+	[--enable-sshd | --disable-sshd]
+	[--console-log]
+	[--slave]
+	[--headless]
+	[--init]
 
 DESCRIPTION
 -----------
@@ -33,38 +33,38 @@ OPTIONS
 -------
 
 -d::
-\--site-path::
+--site-path::
 	Location of the gerrit.config file, and all other per-site
 	configuration data, supporting libraries and log files.
 
-\--enable-httpd::
-\--disable-httpd::
+--enable-httpd::
+--disable-httpd::
 	Enable (or disable) the internal HTTP daemon, answering
 	web requests.  Enabled by default.
 
-\--enable-sshd::
-\--disable-sshd::
+--enable-sshd::
+--disable-sshd::
 	Enable (or disable) the internal SSH daemon, answering SSH
 	clients and remotely executed commands.  Enabled by default.
 
-\--slave::
+--slave::
 	Run in slave mode, permitting only read operations
     by clients.  Commands which modify state such as
     link:cmd-receive-pack.html[receive-pack] (creates new changes
     or updates existing ones) or link:cmd-review.html[review]
     (sets approve marks) are disabled.
 +
-This option automatically implies '\--disable-httpd \--enable-sshd'.
+This option automatically implies '--disable-httpd --enable-sshd'.
 
-\--console-log::
+--console-log::
 	Send log messages to the console, instead of to the standard
 	log file '$site_path/logs/error_log'.
 
-\--headless::
+--headless::
 	Don't start the default Gerrit UI. May be useful when Gerrit is
 	run with an alternative UI.
 
-\--init::
+--init::
 	Run init before starting the daemon. This will create a new site or
 	upgrade an existing site.
 

Documentation/pgm-gsql.txt

@@ -24,7 +24,7 @@ OPTIONS
 -------
 
 -d::
-\--site-path::
+--site-path::
 	Location of the gerrit.config file, and all other per-site
 	configuration data, supporting libraries and log files.
 

Documentation/pgm-init.txt

@@ -10,10 +10,10 @@ SYNOPSIS
 [verse]
 'java' -jar gerrit.war 'init'
 	-d <SITE_PATH>
-	[\--batch]
-	[\--no-auto-start]
-	[\--list-plugins]
-	[\--install-plugin=<PLUGIN_NAME>]
+	[--batch]
+	[--no-auto-start]
+	[--list-plugins]
+	[--install-plugin=<PLUGIN_NAME>]
 
 DESCRIPTION
 -----------
@@ -26,7 +26,7 @@ as necessary.
 
 OPTIONS
 -------
-\--batch::
+--batch::
 	Run in batch mode, skipping interactive prompts.  Reasonable
 	configuration defaults are chosen based on the whims of
 	the Gerrit developers.
@@ -36,21 +36,21 @@ are detected they are *not* automatically dropped, but only a list of
 SQL statements to drop these objects is provided. To drop the unused
 objects these SQL statements have to be executed manually.
 
-\--no-auto-start::
+--no-auto-start::
 	Don't automatically start the daemon after initializing a
 	newly created site path.  This permits the administrator
 	to inspect and modify the configuration before the daemon
 	is started.
 
 -d::
-\--site-path::
+--site-path::
 	Location of the gerrit.config file, and all other per-site
 	configuration data, supporting libraries and log files.
 
-\--list-plugins::
+--list-plugins::
 	Print names of plugins that can be installed during init process.
 
-\--install-plugin:
+--install-plugin:
 	Automatically install plugin with given name without asking.
 
 CONTEXT