Change etcd_host to etcd_address in QEMU driver, add etcd_host and etcd aliases for convenience

qemu-3.1-vitastor.patch

@@ -24,7 +24,7 @@ Index: qemu-3.1+dfsg/qapi/block-core.json
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
-+# @etcd_host:   etcd connection address(es)
++# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
@@ -33,7 +33,7 @@ Index: qemu-3.1+dfsg/qapi/block-core.json
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
-+            '*etcd_host': 'str',
++            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##

qemu-4.2-vitastor.patch

@@ -24,7 +24,7 @@ Index: qemu/qapi/block-core.json
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
-+# @etcd_host:   etcd connection address(es)
++# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
@@ -33,7 +33,7 @@ Index: qemu/qapi/block-core.json
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
-+            '*etcd_host': 'str',
++            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##

qemu-5.0-vitastor.patch

@@ -24,7 +24,7 @@ Index: qemu/qapi/block-core.json
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
-+# @etcd_host:   etcd connection address(es)
++# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
@@ -33,7 +33,7 @@ Index: qemu/qapi/block-core.json
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
-+            '*etcd_host': 'str',
++            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##

qemu-5.1-vitastor.patch

@@ -24,7 +24,7 @@ Index: qemu-5.1+dfsg/qapi/block-core.json
 +# @pool:        Pool ID
 +# @size:        Desired image size in bytes
 +# @config_path: Path to Vitastor configuration
-+# @etcd_host:   etcd connection address(es)
++# @etcd_address: etcd connection address(es)
 +# @etcd_prefix: etcd key/value prefix
 +##
 +{ 'struct': 'BlockdevOptionsVitastor',
@@ -33,7 +33,7 @@ Index: qemu-5.1+dfsg/qapi/block-core.json
 +            '*size': 'uint64',
 +            '*image': 'str',
 +            '*config_path': 'str',
-+            '*etcd_host': 'str',
++            '*etcd_address': 'str',
 +            '*etcd_prefix': 'str' } }
 +
 +##

src/qemu_driver.c

@@ -102,7 +102,7 @@ static void qemu_vitastor_unescape(char *src)
 }
 
 // vitastor[:key=value]*
-// vitastor[:etcd_host=127.0.0.1]:inode=1:pool=1[:rdma_gid_index=3]
+// vitastor[:(etcd|etcd_host|etcd_address)=127.0.0.1]:inode=1:pool=1[:rdma_gid_index=3]
 // vitastor:config_path=/etc/vitastor/vitastor.conf:image=testimg
 static void vitastor_parse_filename(const char *filename, QDict *options, Error **errp)
 {
@@ -199,8 +199,12 @@ static int vitastor_file_open(BlockDriverState *bs, QDict *options, int flags, E
     int64_t ret = 0;
     qemu_mutex_init(&client->mutex);
     client->config_path = g_strdup(qdict_get_try_str(options, "config_path"));
-    // FIXME: Rename to etcd_address
-    client->etcd_host = g_strdup(qdict_get_try_str(options, "etcd_host"));
+    if (qdict_get_try_str(options, "etcd_address"))
+        client->etcd_host = g_strdup(qdict_get_try_str(options, "etcd_address"));
+    else if (qdict_get_try_str(options, "etcd_host"))
+        client->etcd_host = g_strdup(qdict_get_try_str(options, "etcd_host"));
+    else if (qdict_get_try_str(options, "etcd"))
+        client->etcd_host = g_strdup(qdict_get_try_str(options, "etcd"));
     client->etcd_prefix = g_strdup(qdict_get_try_str(options, "etcd_prefix"));
     client->use_rdma = qdict_get_try_int(options, "use_rdma", -1);
     client->rdma_device = g_strdup(qdict_get_try_str(options, "rdma_device"));
@@ -267,6 +271,8 @@ static int vitastor_file_open(BlockDriverState *bs, QDict *options, int flags, E
     qdict_del(options, "rdma_device");
     qdict_del(options, "config_path");
     qdict_del(options, "etcd_host");
+    qdict_del(options, "etcd_address");
+    qdict_del(options, "etcd");
     qdict_del(options, "etcd_prefix");
     qdict_del(options, "image");
     qdict_del(options, "inode");
@@ -512,6 +518,8 @@ static const char *vitastor_strong_runtime_opts[] = {
     "inode",
     "pool",
     "config_path",
+    "etcd",
+    "etcd_address",
     "etcd_host",
     "etcd_prefix",