qemu-config: Document -drive options

Signed-off-by: NLuiz Capitulino <lcapitulino@gmail.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

qemu-config.c

@@ -23,6 +23,7 @@ static QemuOptsList qemu_drive_opts = {
         },{
             .name = "index",
             .type = QEMU_OPT_NUMBER,
+            .help = "index number",
         },{
             .name = "cyls",
             .type = QEMU_OPT_NUMBER,
@@ -46,6 +47,7 @@ static QemuOptsList qemu_drive_opts = {
         },{
             .name = "snapshot",
             .type = QEMU_OPT_BOOL,
+            .help = "enable/disable snapshot mode",
         },{
             .name = "file",
             .type = QEMU_OPT_STRING,
@@ -65,12 +67,15 @@ static QemuOptsList qemu_drive_opts = {
         },{
             .name = "serial",
             .type = QEMU_OPT_STRING,
+            .help = "disk serial number",
         },{
             .name = "rerror",
             .type = QEMU_OPT_STRING,
+            .help = "read error action",
         },{
             .name = "werror",
             .type = QEMU_OPT_STRING,
+            .help = "write error action",
         },{
             .name = "addr",
             .type = QEMU_OPT_STRING,
@@ -78,6 +83,7 @@ static QemuOptsList qemu_drive_opts = {
         },{
             .name = "readonly",
             .type = QEMU_OPT_BOOL,
+            .help = "open drive file as read-only",
         },
         { /* end of list */ }
     },