gnucash maint: Copy obfuscate script from wiki to here, with minor improvements.

[Christian Stimming]

Updated	 via  https://github.com/Gnucash/gnucash/commit/7c767604 (commit)
	from  https://github.com/Gnucash/gnucash/commit/0da0f7ad (commit)



commit 7c767604ffdc595031089cc03c3c0fb6889af56b
Author: Christian Stimming <christian at cstimming.de>
Date:   Mon Feb 4 09:32:51 2019 +0100

    Copy obfuscate script from wiki to here, with minor improvements.
    
    https://wiki.gnucash.org/wiki/ObfuscateScript



Summary of changes:
 util/obfuscate.pl | 158 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100755 util/obfuscate.pl