accel-config: release 3.5.3

Changes:
[ Colin Ian King ]

• pull in various debian changes
• sync changelog entry with debian uploaded version
• free allocated path if execlp fails

[ Li Zhang ]

• Fix bug of setting max destination size

[ Ramesh Thomas ]

• Remove some leftover references to mdev
• Remove text about installing kernel headers
• Install tests in /usr/libexec
• Update RPM scripts to install tests in /usr/libexec
• Remove uninitialized local variable warning
• Modify script to include author in changelog

[ Tony Zhu ]

• Update user test script with path /usr/lib
• Update user test script with path /usr/libexec
• Remove read_buffers 0 settings from configs