lib/cipher: constify allnet_sign
added a comment to explain that data_size should include the signature size
lib: code reordering for wp_arith.c, comment fix
Merge branch 'wp_arith' into voice-over-allnet
Merge remote-tracking branch 'remotes/andreas/wp_arith'

Merging AB's wp_arith code reordering
Merge remote-tracking branch 'remotes/andreas/constify-allnet-encrypt'

merging AB's const parameter to allnet_sign
added sensible command-line switches to the trace command
fixed a bug in trace.c option parsing
Merge branch 'master' into voice-over-allnet
voa: resend request every 2s if no answer received, abort after 10x
voa: init_data function for defaults
voa: send to named contact instead of by-address
voa: fix headersize

allnet_app_media_header is not set on stream packets, only on requests
voa: documentation clarification
voa: reuse variable
voa: merge address masking into function
voa: encrypt handshake (untested)