Pull request: underbar cleanup in scmutil and util

[Adrian Buehlmann]

I've pushed some underbar elimination changes to
https://bitbucket.org/abuehl/mercurial-crew

Feel free to rebase/fold.

Let me know if you prefer these as patchbomb.

changeset:   14216:f4189866c76c
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 14:52:25 2011 +0200
summary:     rename scmutil.os_rcpath to osrcpath

changeset:   14217:f0ca440b5722
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 14:54:05 2011 +0200
summary:     rename scmutil.system_rcpath to systemrcpath

changeset:   14218:73cca883370d
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 14:58:04 2011 +0200
summary:     rename scmutil.user_rcpath to userrcpath

changeset:   14219:94985b5a8278
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:02:53 2011 +0200
summary:     scmutil: rename local function _add_dir_if_not_there

changeset:   14220:116de1da2154
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:10:29 2011 +0200
summary:     rename util.main_is_frozen to mainfrozen

changeset:   14221:85fd8402cbc4
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:13:46 2011 +0200
summary:     rename util.set_hgexecutable to _sethgexecutable

changeset:   14222:d51630301241
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:16:22 2011 +0200
summary:     rename util.lookup_reg to lookupreg

changeset:   14223:8abe4db2d162
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:19:48 2011 +0200
summary:     rename util.parse_patch_output to parsepatchoutput

changeset:   14224:df2399663392
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:22:31 2011 +0200
summary:     rename util.set_flags to setflags

changeset:   14225:659f34b833b9
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:25:35 2011 +0200
summary:     rename util.set_binary to setbinary

changeset:   14226:600e64004eb5
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:31:09 2011 +0200
summary:     rename explain_exit to explainexit

changeset:   14227:b9e1b041744f
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:34:34 2011 +0200
summary:     rename util.os_link to oslink

changeset:   14228:e949a008999d
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:36:05 2011 +0200
summary:     rename util.executable_path to executablepath

changeset:   14229:4d684d8210a1
tag:         tip
user:        Adrian Buehlmann <adrian at cadifra.com>
date:        Fri May 06 15:41:04 2011 +0200
summary:     rename util.set_signal_handler to setsignalhandler