FFL: Make tcp_maxmtu() and tcp_maxmtu6() return uint32_t instead of u_long

[jtl]

Summary

Change tcp_maxmtu() and tcp_maxmtu6() so they return uint32_t instead of u_long. Values greater than uint32_t do not make sense in this context.

[jtl]

Committed in rS306769.

sys/netinet/tcp_input.c

 
 Add apcupsd_enable=YES to your /etc/rc.conf[.local] to have apcupsd
 starting up at boot time.
 
 For default, apcupsd starts with `--kill-on-powerfail` parameter.
 Please, read its man page, and if this is not the intended behavior you want,
 change it accordingly.
 
+If connected via USB and apcaccess reports incomplete data consider enabling
+the USB_REPORTING options via 'make config'.  This contains an experimental
+patch that may fix some USB attach APC UPS. PR #249041
+
 In some systems where the shutdown can take a while (like in bhyve environment),
 you may want to change this behavior as follows:
 
 Set apcupsd_flags="--term-on-powerfail" on your /etc/rc.conf[.local].
 
 Add this to /etc/rc.shutdown, after the "Insert other shutdown procedures here"
 line:
   test -f /var/run/powerfail && /usr/local/sbin/apcupsd --hibernate
   or
   test -f /var/run/powerfail && /usr/local/sbin/apcupsd --power-off
 EOM
 }
 ]

sys/netinet/tcp_subr.c

 
 Add apcupsd_enable=YES to your /etc/rc.conf[.local] to have apcupsd
 starting up at boot time.
 
 For default, apcupsd starts with `--kill-on-powerfail` parameter.
 Please, read its man page, and if this is not the intended behavior you want,
 change it accordingly.
 
+If connected via USB and apcaccess reports incomplete data consider enabling
+the USB_REPORTING options via 'make config'.  This contains an experimental
+patch that may fix some USB attach APC UPS. PR #249041
+
 In some systems where the shutdown can take a while (like in bhyve environment),
 you may want to change this behavior as follows:
 
 Set apcupsd_flags="--term-on-powerfail" on your /etc/rc.conf[.local].
 
 Add this to /etc/rc.shutdown, after the "Insert other shutdown procedures here"
 line:
   test -f /var/run/powerfail && /usr/local/sbin/apcupsd --hibernate
   or
   test -f /var/run/powerfail && /usr/local/sbin/apcupsd --power-off
 EOM
 }
 ]

sys/netinet/tcp_var.h

 
 Add apcupsd_enable=YES to your /etc/rc.conf[.local] to have apcupsd
 starting up at boot time.
 
 For default, apcupsd starts with `--kill-on-powerfail` parameter.
 Please, read its man page, and if this is not the intended behavior you want,
 change it accordingly.
 
+If connected via USB and apcaccess reports incomplete data consider enabling
+the USB_REPORTING options via 'make config'.  This contains an experimental
+patch that may fix some USB attach APC UPS. PR #249041
+
 In some systems where the shutdown can take a while (like in bhyve environment),
 you may want to change this behavior as follows:
 
 Set apcupsd_flags="--term-on-powerfail" on your /etc/rc.conf[.local].
 
 Add this to /etc/rc.shutdown, after the "Insert other shutdown procedures here"
 line:
   test -f /var/run/powerfail && /usr/local/sbin/apcupsd --hibernate
   or
   test -f /var/run/powerfail && /usr/local/sbin/apcupsd --power-off
 EOM
 }
 ]