DBLP fetcher seems to be broken

[matthiasgeiger]

JabRef version 3.7 and master

Steps to reproduce:

1. Search for an arbitrary search term using DBLP

15:39:27.560 [JabRef CachedThreadPool] ERROR net.sf.jabref.gui.importer.fetcher.DBLPFetcher - Error while fetching from DBLP
java.net.MalformedURLException: no protocol: URL#10133
	at java.net.URL.<init>(URL.java:586) ~[?:1.8.0_60]
	at java.net.URL.<init>(URL.java:483) ~[?:1.8.0_60]
	at java.net.URL.<init>(URL.java:432) ~[?:1.8.0_60]
	at net.sf.jabref.logic.net.URLDownload.<init>(URLDownload.java:71) ~[main/:?]
	at net.sf.jabref.gui.importer.fetcher.DBLPFetcher.processQuery(DBLPFetcher.java:87) ~[main/:?]
	at net.sf.jabref.gui.importer.fetcher.GeneralFetcher.lambda$actionPerformed$165(GeneralFetcher.java:217) ~[main/:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_60]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_60]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]