Allow uploaded filenames to contain space characters (not Yoda) by default

Increase the minmimum free disk space to 1G by default (most modern computer
sysops will probably want to increase this even more).

ctrl/file.ini

-min_dspace=100M
+min_dspace=1G
 max_batup=25
 max_batdn=100
 max_userxfer=5
@@ -6,7 +6,7 @@ upload_credit_pct=100
 download_credit_pct=90
 leech_pct=0
 leech_sec=60
-settings=0
+settings=4
 filename_maxlen=64
 [viewer:0]
 	extension=TXT