radsecproxy: add config options for UCI, fix escaping

radsecproxy: add config options for UCI, fix escaping

This adds more config options for use in UCI, esp. new configuration
options that were introduced in newer radsecproxy versions and it fixes
an escaping issue in the init script where a string containing single
quotes would still be escaped using single quotes, causing radsecproxy
to reject the config.

This also bumps the PKG_RELEASE in the Makefile

Signed-off-by: Jan-Frederik Rieckers <redacted>