Use filter_var in guessBaseUrl
Use filter_var in guessBaseUrl

See https://github.com/FreshRSS/FreshRSS/issues/906
See https://github.com/FreshRSS/FreshRSS/pull/915/files#r35304704

aledeg/FreshRSS,asmundg/FreshRSS,FreshRSS/FreshRSS,samuelstein/FreshRSS,marienfressinaud/FreshRSS,marienfressinaud/FreshRSS,samuelstein/FreshRSS,romibi/FreshRSS,marienfressinaud/FreshRSS,Alkarex/FreshRSS,superboum/FreshRSS,aledeg/FreshRSS,aledeg/FreshRSS,Alkarex/FreshRSS,asmundg/FreshRSS,aledeg/FreshRSS,Dolomich/FreshRSS,romibi/FreshRSS,FreshRSS/FreshRSS,Dolomich/FreshRSS,asmundg/FreshRSS,Alkarex/FreshRSS,superboum/FreshRSS,Dolomich/FreshRSS,Alkarex/FreshRSS,marienfressinaud/FreshRSS,FreshRSS/FreshRSS,FreshRSS/FreshRSS,romibi/FreshRSS,samuelstein/FreshRSS,superboum/FreshRSS,romibi/FreshRSS