odhcpd: update to git HEAD version

odhcpd: update to git HEAD version

93abe6f config: fix invalid hoplimit in RA message
2ae08d1 config: fix invalid retranstime in RA message
0005cb4 config: fix invalid reachabletime in RA message
5683dd2 config: limit ra_mtu to 65535
f8d40a5 router: fix interface mtu read error
f8f4b87 config: limit ra_retranstime to 60000
a2d8bf6 dhcpv4: display two hex digits per octet in syslog
a9e9bc4 config: make RA retransTime configurable via uci
2cb6b48 config: make RA reachableTime configurable via uci
e4504db config: make RA curHopLimit configurable via uci
9dd5316 config: make RA mtu configurable via UCI
29cb2ff config: fix dhcpv4 server being started
0ef74ec ndp.c: add switch/case fallthrough comments

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>