encase optional parameters in <> instead of ()

functions/server

@@ -6,9 +6,9 @@ function server_help() {
     $(basename ${0})   {--attach}
 commands:
     create    [servername] [network name]
-    start     [servername] [port] (ip)
+    start     [servername] [port] <ip>
     stop      [servername]
-    restart   [servername] [port] (ip)
+    restart   [servername] [port] <ip>
     attach    [servername]
     reset     [servername]
     delete    [servername]

pms-cli

@@ -18,7 +18,7 @@ declare debuglevel=3
 
 function usage_general() {
 cat <<EOF
-usage: $(basename $0) <operation> [...]
+usage: $(basename $0) <operation> [subcommand]
 operations:
     $(basename ${0})   {-h --help}
     $(basename ${0})   {-V --version}