Commit Briefs
Show only whitelisted commit headers in 'got log'
Generic way to deal with gpgsig header or extra headers added by some tools. All headers still available via 'got cat' ok stsp@
Replace fgetln() with getline()
getline() is, per the latter's OpenBSD man page, safer and more portable than fgetln().
Add missing includes for time() and ctime()
These headers were implicitly used on OpenBSD, but building on Linux revealed that <time.h> wasn't included directly. diffreg.c uses ctime(), which additionally needs <sys/types.h>.