fix of a minor bug reported by syssecurity7@googlemail.com (missing iso-8858...)

doc/THANKS

@@ -500,6 +500,9 @@ Stuffe <stuffe.dk@gmail.com>
 Sylphid <sylphid.su@sti.com.tw>
     for suggesting some features
 
+syssecurity.info <syssecurity7@googlemail.com>
+    for reporting a minor bug
+
 ToR <sstidus@email.it>
     for reporting considerable amount of bugs
     for suggesting a feature

lib/request/basic.py

@@ -103,6 +103,8 @@ def checkCharEncoding(encoding):
     # http://philip.html5.org/data/charsets-2.html
     if encoding in translate:
         encoding = translate[encoding]
+    elif encoding.startswith('iso-8858'): #very popular typo
+        encoding = encoding.replace('8858', '8859')
     elif encoding.startswith('cp-'):
         encoding = 'cp%s' % encoding[3:]
     elif encoding.startswith('windows') and not encoding.startswith('windows-'):
@@ -110,6 +112,7 @@ def checkCharEncoding(encoding):
     elif encoding == 'null':
         return None
 
+    # http://www.iana.org/assignments/character-sets
     try:
         codecs.lookup(encoding)
     except LookupError: