code compiles under apache 1.3 and 2.0
updated apache m4 script to detect both verions (two minumums)
defaulted install to not activate module in configuration file (use make activate)
moved autoconf DEFUN macros to m4 subdirectory
autogen.sh calls aclocal to include m4 directory.
merged in changes from 1.19b1
fixed log_sql_merge_config bug in 1.19b1
release 1.91
* New capability: log mod_usertrack cookies.
* Some code cleanup and commenting.
* Referer and User-Agent now set to want_orig=1 ( a very minor detail )
* Corrected mysql_escape_log to properly check for and escape strings
with 'dangerous' characters. It appears that it was doing this
incorrectly before.
* Deleted log_mysql_child(), a function that was never called.