Ignore invalid TagOpt values

C git silently ignores invalid tagopt values; so make JGit behave the
same way.

Bug: 429625
Change-Id: I99587cc46c7e0c19348bcc63f602038fa9a7f378
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>

org.eclipse.jgit/src/org/eclipse/jgit/transport/RemoteConfig.java

@@ -206,8 +206,13 @@ public class RemoteConfig implements Serializable {
 		}
 		receivepack = val;
 
-		val = rc.getString(SECTION, name, KEY_TAGOPT);
-		tagopt = TagOpt.fromOption(val);
+		try {
+			val = rc.getString(SECTION, name, KEY_TAGOPT);
+			tagopt = TagOpt.fromOption(val);
+		} catch (IllegalArgumentException e) {
+			// C git silently ignores invalid tagopt values.
+			tagopt = TagOpt.AUTO_FOLLOW;
+		}
 		mirror = rc.getBoolean(SECTION, name, KEY_MIRROR, DEFAULT_MIRROR);
 		timeout = rc.getInt(SECTION, name, KEY_TIMEOUT, 0);
 	}