Name the default configure log filename as "config.log" rather than

"config.err". The former name was misleading, as the file contains
useful information not necessarily related to errors.

Originally committed as revision 23630 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -61,7 +61,7 @@ Options: [defaults in brackets after descriptions]
 
 Standard options:
   --help                   print this message
-  --logfile=FILE           log tests and output to FILE [config.err]
+  --logfile=FILE           log tests and output to FILE [config.log]
   --disable-logging        do not log configure debug information
   --prefix=PREFIX          install in PREFIX [$prefix]
   --bindir=DIR             install binaries in DIR [PREFIX/bin]
@@ -1440,7 +1440,7 @@ doc_deps="texi2html"
 
 # default parameters
 
-logfile="config.err"
+logfile="config.log"
 
 # installation paths
 prefix_default="/usr/local"