Improve the MCA param help messages for btl_tcp_if_in|exclude.

This commit was SVN r21968.

ompi/mca/btl/tcp/btl_tcp_component.c

@@ -201,9 +201,9 @@ int mca_btl_tcp_component_open(void)
     mca_btl_tcp_component.tcp_num_links =
         mca_btl_tcp_param_register_int("links", NULL, 1);
     mca_btl_tcp_component.tcp_if_include =
-        mca_btl_tcp_param_register_string("if_include", NULL, "");
+        mca_btl_tcp_param_register_string("if_include", "Comma-delimited list of devices or CIDR notation of networks to use for MPI communication (e.g., \"eth0,eth1\" or \"192.168.0.0/16,10.1.4.0/24\").  Mutually exclusive with btl_tcp_if_exclude.", "");
     mca_btl_tcp_component.tcp_if_exclude =
-        mca_btl_tcp_param_register_string("if_exclude", NULL, "lo,sppp");
+        mca_btl_tcp_param_register_string("if_exclude", "Comma-delimited list of devices or CIDR notation of networks to NOT use for MPI communication -- all devices not matching these specifications will be used (e.g., \"eth0,eth1\" or \"192.168.0.0/16,10.1.4.0/24\").  Mutually exclusive with btl_tcp_if_include.", "lo,sppp");
     mca_btl_tcp_component.tcp_free_list_num =
         mca_btl_tcp_param_register_int ("free_list_num", NULL, 8);
     mca_btl_tcp_component.tcp_free_list_max =

ompi/mca/btl/tcp/help-mpi-btl-tcp.txt

@@ -17,7 +17,7 @@ value will be ignored.
   Local host: %s
   Value:      %s
   Message:    %s
-
+%
 [invalid minimum port]
 WARNING: An invalid value was given for the btl_tcp_port_min_%s. Legal
 values are in the range [1 .. 2^16-1]. This value will be ignored
@@ -25,4 +25,3 @@ values are in the range [1 .. 2^16-1]. This value will be ignored
 
   Local host: %s
   Value:      %d
-